This Healthy Tuna Melt Sandwich is a lighter take on a classic comfort-food favorite. It’s packed with protein from tuna and nonfat Greek yogurt, loaded with crunchy dill pickles, pepperoncini, and red onion, and finished with melted cheddar on crispy sourdough bread.
Instead of loading the tuna salad with mayonnaise, this recipe uses a combination of nonfat Greek yogurt and light mayo to create a creamy, flavorful tuna mixture while keeping it lighter. The red wine vinegar, garlic, pickles, and pepperoncini add plenty of tangy flavor without needing a heavy sauce.
It comes together quickly and makes an easy high-protein lunch or weeknight meal.
Ingredients
- 2 cans tuna in water, drained
- 4 slices sourdough bread
- 3 tbsp plain nonfat Greek yogurt
- 2 tbsp low-fat mayonnaise
- 1 tbsp red wine vinegar
- 1 tsp garlic powder
- 1 tsp salt
- 1 tsp black pepper
- 1/2 cup chopped dill pickles
- 4 pepperoncini, finely diced
- 1/4 cup finely diced red onion
- 2 slices thinly sliced cheddar cheese
Instructions
1. Make the Tuna Salad
In a large bowl, whisk together the Greek yogurt, 1 tablespoon of the light mayo, red wine vinegar, garlic powder, salt, and pepper until smooth and well combined.
Add the drained tuna, chopped dill pickles, diced pepperoncini, and red onion.
Gently toss everything together until the tuna is evenly coated and all of the ingredients are combined.
2. Toast the Bread
Heat a pan over medium heat.
Spread the remaining 1 tablespoon of light mayo into a very thin layer on one side of each slice of sourdough bread.
Place the bread mayo-side down in the heated pan.
Add a slice of thinly sliced cheddar cheese to two of the slices of bread while they toast. Cook for about 60–90 seconds, or until the bread is golden brown and the cheese begins to melt.
3. Assemble the Tuna Melts
Remove the toasted bread from the pan.
Divide the tuna mixture between the two slices of bread topped with melted cheddar.
Top each with the remaining slice of toasted bread and gently press together.
Slice in half and serve immediately.
Tips for the Best Tuna Melt
Drain the tuna well. Excess water can make the tuna mixture too wet and prevent the sandwich from holding together.
Don’t overdo the mayo. A very thin layer on the outside of the bread gives you that crispy, golden crust without needing much mayo.
Keep the heat at medium. This gives the bread enough time to get golden and crispy while allowing the cheddar to melt.
Add the pickles and pepperoncini. The combination gives this tuna melt a bright, tangy flavor that helps keep the sandwich from tasting heavy.
Why You’ll Love This Healthy Tuna Melt
This sandwich is a simple way to make a classic tuna melt a little lighter without sacrificing flavor. The Greek yogurt adds creaminess to the tuna salad, while the light mayo helps give it that familiar tuna-salad flavor.
The combination of crispy sourdough, melted cheddar, creamy tuna, crunchy pickles, pepperoncini, and red onion makes this an easy high-protein lunch you’ll want to make again and again.
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