Tuna Melt Open-Faced Sandwich

Featured in: Home Kitchen Cooking

This comforting open-faced sandwich combines a creamy tuna salad with melted cheese on buttery toasted bread. The tuna salad gets its richness from mayonnaise and brightness from Dijon mustard, lemon juice, and fresh vegetables. Broiled until the cheese bubbles and turns golden brown, each layer adds texture and flavor.

Ready in under 20 minutes, this adaptable lunch works with various cheeses and breads. The contrast between warm melted cheese, cool crisp vegetables, and hearty tuna makes it satisfying yet light enough for any meal.

Updated on Wed, 14 Jan 2026 11:16:00 GMT
Golden, bubbling cheddar melts over savory tuna salad on toasted sourdough, a classic open-faced Tuna Melt ready to serve. Pin it
Golden, bubbling cheddar melts over savory tuna salad on toasted sourdough, a classic open-faced Tuna Melt ready to serve. | casaamanar.com

Rainy Sunday afternoons growing up meant one thing from my grandmother's kitchen—that distinctive buttery aroma wafting through the house meant tuna melts were happening. I've recreated this ritual countless times in my own tiny apartment, watching steam fog up the windows while bread transforms under the broiler. Something about the contrast of warm, bubbling cheese against cool, zesty tuna salad just makes everything feel right in the world.

I made these for my roommates during our first proper dinner party in our new place last fall. We'd spent all day unpacking boxes and were too exhausted to cook anything elaborate, but these tuna melts turned a chaotic evening into something cozy and memorable. Now they request them whenever anyone's had a rough week.

What's for Dinner Tonight? 🤔

Stop stressing. Get 10 fast recipes that actually work on busy nights.

Free. No spam. Just easy meals.

Ingredients

  • 2 cans tuna in water: I've learned draining it really thoroughly makes all the difference between a watery salad and one that holds together beautifully on the bread
  • 1/4 cup mayonnaise: This is the creamy backbone that binds everything together, though I sometimes mix in a little Greek yogurt for tang
  • 1 tablespoon Dijon mustard: Adds just enough sharpness to cut through the richness
  • 1 celery stalk, finely chopped: Brings this essential crunch that keeps every bite interesting
  • 2 tablespoons red onion: Don't skip this, the little bites of sharp onion make the whole thing sing
  • 1 tablespoon fresh parsley: Totally optional, but I love how it makes everything taste fresh
  • 1 teaspoon lemon juice: Brightens up the whole mixture and keeps the tuna from tasting flat
  • Salt and black pepper: Trust your palate here, the tuna needs a good amount of seasoning
  • 4 slices hearty bread: Sourdough is my absolute favorite because it holds up so well under all those toppings
  • 4 slices tomato: Creates this lovely moisture layer between the tuna and melting cheese
  • 1 cup shredded cheddar cheese: Cheddar melts beautifully, but Gruyère takes it to another level if you're feeling fancy
  • 2 tablespoons unsalted butter: Getting this on the bread before broiling is what creates that irresistible golden bottom

Tired of Takeout? 🥡

Get 10 meals you can make faster than delivery arrives. Seriously.

One email. No spam. Unsubscribe anytime.

Instructions

Get your broiler ready:
Move that oven rack to the upper middle position and turn on the broiler so it's nice and hot when you need it
Mix up the tuna salad:
Combine everything in a bowl and give it a good stir, making sure all those crunchy bits are evenly distributed throughout
Butter your bread:
Spread that softened butter on one side of each slice and place them butter side up on your baking sheet
Create the first toast:
Slide under the broiler for just 1 to 2 minutes, watching like a hawk because bread can go from golden to burnt in seconds
Build your melts:
Flip each slice so the toasted side faces down, pile on that tuna salad, add a tomato slice, then blanket everything generously with cheese
Melt and bubble:
Back under the broiler for 3 to 5 minutes, staying close by to catch that perfect moment when the cheese turns golden and starts bubbling
The waiting game:
Let them sit for just a minute so you don't burn your mouth on that molten cheese, though I know that's easier said than done
Warm and toasty bread holds a creamy tuna filling topped with melted cheese in this comforting open-faced Tuna Melt. Pin it
Warm and toasty bread holds a creamy tuna filling topped with melted cheese in this comforting open-faced Tuna Melt. | casaamanar.com

My partner proposed we add these to our regular dinner rotation, and honestly, they're not wrong. There's something about the ritual of assembling them together at the counter, chatting while we wait for the broiler to work its magic.

Still Scrolling? You'll Love This 👇

Our best 20-minute dinners in one free pack — tried and tested by thousands.

Trusted by 10,000+ home cooks.

Making It Your Own

I've discovered that a pinch of smoked paprika in the tuna salad adds this wonderful depth that makes people ask what the secret ingredient is. Sometimes I'll swap in a little hot sauce when I want to wake things up.

Bread Wisdom

The bread you choose absolutely matters here. I learned this the hard way with flimsy sandwich bread that turned soggy halfway through broiling. Go for something with substance that can hold up under the weight of all those toppings.

Perfect Pairings

A crisp green salad with vinaigrette cuts through the richness beautifully. I also love serving these with pickles on the side for that perfect acid contrast.

  • A simple tomato soup transforms this into a complete comfort meal
  • Cornichons or bread and butter pickles add the perfect tangy bite
  • Keep some extra napkins nearby, these can get wonderfully messy
Cheesy Tuna Melt broiled until golden brown, served hot with a side of dill pickles and a crisp green salad. Pin it
Cheesy Tuna Melt broiled until golden brown, served hot with a side of dill pickles and a crisp green salad. | casaamanar.com

Hope these bring you as many cozy moments as they've brought me.

Recipe FAQs

What bread works best for tuna melts?

Sourdough and whole wheat breads provide sturdy bases that hold up well under the toppings. Their hearty texture prevents sogginess while toasting creates a crispy foundation.

Which cheese melts best for tuna melts?

Cheddar offers sharp flavor and excellent melting properties. Swiss adds nutty notes, Gruyère provides rich depth, and mozzarella delivers stretchy texture. Any combination creates delicious results.

Can I make tuna melts ahead of time?

Prepare the tuna salad up to 24 hours in advance and store it refrigerated. Assemble and broil the sandwiches just before serving for the best texture and hottest results.

How do I prevent soggy bread?

Lightly toast the buttered bread first before adding toppings. This creates a barrier against moisture. Also, drain tuna thoroughly and avoid overdressing the salad with mayonnaise.

What can I serve with tuna melts?

A crisp green salad with vinaigrette balances the richness. Pickles add tangy contrast, tomato soup provides comfort, or fresh fruit offers light sweetness to complete the meal.

Can I make a lighter version?

Substitute Greek yogurt for half the mayonnaise, use reduced-fat cheese, and choose whole grain bread. These adjustments maintain creaminess while reducing calories and fat.

20-Minute Dinner Pack — Free Download 📥

10 recipes, 1 shopping list. Everything you need for a week of easy dinners.

Instant access. No signup hassle.

Tuna Melt Open-Faced Sandwich

Creamy tuna salad on toasted bread with melted cheese, broiled until golden and bubbly.

Prep Duration
10 mins
Time to Cook
8 mins
Overall Time
18 mins
Created by Randolph Kline

Recipe Type Home Kitchen Cooking

Skill Level Easy

Cuisine Type American

Makes 4 Portions

Dietary Notes None specified

What You'll Need

Tuna Salad

01 2 cans (5 oz each) tuna in water, drained
02 1/4 cup mayonnaise
03 1 tablespoon Dijon mustard
04 1 celery stalk, finely chopped
05 2 tablespoons red onion, finely chopped
06 1 tablespoon fresh parsley, chopped
07 1 teaspoon lemon juice
08 Salt and black pepper, to taste

Sandwich Assembly

01 4 slices hearty bread (sourdough or whole wheat)
02 4 slices tomato
03 1 cup (about 4 oz) shredded cheddar cheese
04 2 tablespoons unsalted butter, softened

How-To Steps

Step 01

Preheat Broiler: Preheat your oven broiler or set a toaster oven to broil setting.

Step 02

Prepare Tuna Salad: In a medium bowl, combine tuna, mayonnaise, Dijon mustard, celery, red onion, parsley, lemon juice, salt, and black pepper. Mix until thoroughly incorporated.

Step 03

Toast Bread: Arrange bread slices on a baking sheet. Lightly spread butter on one side of each slice. Place buttered side up under broiler for 1–2 minutes until golden.

Step 04

Assemble Sandwiches: Turn bread slices over with toasted side down. Spread tuna salad evenly over each slice. Top with tomato slices, then sprinkle generously with shredded cheese.

Step 05

Melt and Serve: Return baking sheet to broiler and cook for 3–5 minutes, watching carefully, until cheese is melted and bubbling with golden brown edges. Let cool slightly before serving warm.

You Just Made Something Great 👏

Want more like this? Get my best easy recipes — free, straight to your inbox.

Join 10,000+ home cooks. No spam.

Tools You’ll Need

  • Mixing bowl
  • Spoon or spatula
  • Baking sheet
  • Oven or toaster oven
  • Knife and cutting board

Allergy Details

Review each component for allergens and speak with a healthcare provider if you're unsure.
  • Fish (tuna), Eggs (mayonnaise), Dairy (cheese, butter), Gluten (bread)

Nutrition Info (each serving)

Nutritional details are just for reference. Always check with a medical expert for advice.
  • Caloric Value: 370
  • Fats: 20 g
  • Carbohydrates: 26 g
  • Proteins: 22 g

Cooking Shouldn't Be Hard ❤️

Get a free recipe pack that makes weeknight dinners effortless. Real food, real fast.

Free forever. Unsubscribe anytime.