Quick Recipe Version (TL;DR)
Quick Ingredients
- 1 (5 oz / 142 g) can tuna, drained
- 3 tbsp mayonnaise
- 1/4 cup finely diced celery (about 1 small stalk)
- 1 tsp Dijon or yellow mustard
- 1 tsp lemon juice (optional)
- 1/8 tsp kosher salt, plus more to taste
- 1/8 tsp black pepper
- 2 everything bagels, split
- 1 tbsp softened butter (optional, for toasting)
- 4 slices Swiss cheese (about 3 oz / 85 g)
Do This
- 1. Preheat oven broiler to high and position a rack about 6 inches (15 cm) from the heat source.
- 2. In a bowl, mix drained tuna, mayonnaise, celery, mustard, lemon juice (if using), salt, and pepper until chunky and well combined.
- 3. Split everything bagels; lightly butter the cut sides if desired and place cut-side up on a baking sheet.
- 4. Broil bagels 1–2 minutes until lightly toasted at the edges; watch closely so they do not burn.
- 5. Divide tuna mixture evenly over the toasted bagel halves, spreading all the way to the edges.
- 6. Top each half with a slice of Swiss cheese and broil 2–4 minutes until the cheese is melted, bubbly, and lightly browned.
- 7. Let cool 1–2 minutes, then serve hot, optionally garnished with chopped herbs or a sprinkle of black pepper.
Why You’ll Love This Recipe
- Hearty and comforting, with toasted everything bagels and gooey Swiss cheese that feels diner-style but made at home.
- Simple pantry-friendly ingredients come together in under 20 minutes.
- Chunky tuna salad with celery and mustard adds freshness and tang without being fussy.
- Easy to customize: spice it up, add veggies, or swap cheeses based on what you have.
Grocery List
- Produce: 1 small stalk celery, 1 lemon (optional), fresh chives or parsley (optional garnish)
- Dairy: Swiss cheese slices, butter (optional)
- Pantry: Canned tuna, mayonnaise, Dijon or yellow mustard, everything bagels, kosher or sea salt, black pepper
Full Ingredients
For the Chunky Tuna Salad
- 1 (5 oz / 142 g) can tuna, drained well (chunk light or albacore in water)
- 3 tbsp mayonnaise
- 1/4 cup finely diced celery (about 1 small stalk)
- 1 tsp Dijon mustard (or yellow mustard for a milder flavor)
- 1 tsp fresh lemon juice (optional, for brightness)
- 1/8 tsp kosher salt, plus more to taste
- 1/8 tsp freshly ground black pepper
For the Bagels and Cheese
- 2 everything bagels, split horizontally
- 1 tbsp unsalted butter, softened (optional, for toasting the bagels)
- 4 slices Swiss cheese (about 3 oz / 85 g total), or enough to cover the tops
Optional Garnish
- 1 tbsp finely chopped fresh chives or parsley
- Pinch of smoked paprika or red pepper flakes
Step-by-Step Instructions
Step 1: Preheat the broiler and prepare the rack
Set your oven to the broil setting on high. Position an oven rack so it sits about 6 inches (15 cm) below the broiler element. This distance helps the cheese melt and brown without burning the bagels too quickly.
Line a baking sheet with foil or parchment for easy cleanup. Place it near the stove so you can quickly transfer the bagels in and out of the oven.
Step 2: Mix the chunky tuna salad
In a medium mixing bowl, add the drained tuna, breaking it up slightly with a fork but leaving some small chunks for texture. Add the mayonnaise, diced celery, mustard, lemon juice (if using), salt, and pepper.
Stir until everything is evenly combined. Taste and adjust the seasoning: add a pinch more salt for savoriness, more mustard for tang, or a little extra mayonnaise if you prefer a creamier mixture. The tuna salad should hold together when spooned but still look chunky, not mashed.
Step 3: Split and (optionally) butter the bagels
Split the everything bagels in half horizontally. Arrange the halves cut-side up on the prepared baking sheet. For extra flavor and crispness, spread a thin layer of softened butter on the cut sides. This helps them toast up golden and adds richness, but you can skip the butter if you want to lighten things up.
Step 4: Toast the bagels under the broiler
Slide the baking sheet under the broiler and toast the bagel halves for 1–2 minutes, just until the edges start to turn golden and the surfaces feel a little crisp. Stay close and watch carefully; they can go from perfectly toasted to too dark very quickly.
Remove the baking sheet from the oven as soon as you see light browning. Leave the broiler on for the next step.
Step 5: Pile on the tuna salad
Divide the tuna salad evenly among the four toasted bagel halves, aiming for about 1/4 of the mixture per half. Use the back of a spoon to spread it out evenly, going all the way to the edges so the topping protects the bagels from burning under the broiler.
Gently press the tuna down so it sits in a relatively even layer. This helps the cheese sit nicely on top and melt uniformly.
Step 6: Top with Swiss cheese and broil until bubbly
Place 1 slice of Swiss cheese on each tuna-covered bagel half, tearing or overlapping slices as needed so the tuna is mostly covered. Return the baking sheet to the oven.
Broil for 2–4 minutes, watching closely. The cheese should melt completely, become bubbly, and pick up some golden spots, while the edges of the bagels become crisp. Rotate the pan halfway through if your broiler heats unevenly.
When the cheese looks melted and lightly browned, carefully remove the baking sheet from the oven and let the tuna melts cool for 1–2 minutes to set slightly.
Step 7: Garnish and serve
Transfer the tuna melts to plates using a spatula. If you like, sprinkle with chopped chives or parsley and a pinch of smoked paprika or red pepper flakes for color and a little kick.
Serve immediately while the bagels are crisp and the cheese is hot and gooey. These are perfect on their own or with a simple green salad, sliced tomatoes, or pickle spears on the side.
Pro Tips
- Dry the tuna well: Press the tuna gently in the can with the lid or your fingers to remove excess water. A drier tuna makes a creamier, more flavorful salad.
- Watch the broiler like a hawk: Broilers vary a lot. Peek every 30 seconds once the cheese starts melting so you get bubbling, golden cheese instead of scorched tops.
- Spread to the edges: Cover the entire bagel surface with tuna and cheese. Exposed bread burns faster under the broiler.
- Customize the crunch: For softer melts, skip pre-toasting the bagels. For extra crunch, toast them a bit longer before adding the tuna.
- Upgrade the flavor: A tiny splash of lemon juice or an extra grind of black pepper right before serving brightens the whole sandwich.
Variations
- Spicy Tuna Melt: Stir 1–2 tsp finely chopped pickled jalapeños or 1/4 tsp crushed red pepper flakes into the tuna salad, and finish with a drizzle of hot sauce before serving.
- Veggie-Loaded Melt: Add 2 tbsp finely diced red onion and 2 tbsp finely diced bell pepper or dill pickle to the tuna salad for extra crunch and color.
- Cheese Swap: Replace Swiss with sharp cheddar, provolone, or pepper jack for a different flavor profile while keeping the same method.
Storage & Make-Ahead
The tuna salad can be prepared up to 3 days ahead. Store it in an airtight container in the refrigerator. Give it a quick stir and taste for seasoning before using, as flavors can mellow over time.
For best texture, assemble and broil the bagels just before serving. Once broiled, tuna melts are best eaten fresh; leftover assembled melts tend to become soggy as they sit. If you do have leftovers, refrigerate them in an airtight container for up to 1 day, then reheat under the broiler on low or in a toaster oven until warmed through and the cheese re-melts. The bagels will be softer but still tasty.
Nutrition (per serving)
Approximate values per serving (1 bagel with tuna and cheese, assuming butter is used): about 600–650 calories, 33 g protein, 33 g fat, 48 g carbohydrates, 3–4 g fiber, and 900–1,000 mg sodium. Exact numbers will vary based on the brands of tuna, mayonnaise, bagels, and cheese you use, and whether you include optional butter and garnishes.
