8 slices jarred jalapeno pepper, diced, or more to taste
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2 tablespoons mayonnaise, or to taste
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1 tablespoon pickle relish
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1 tablespoon lemon juice
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0.5 teaspoon ground black pepper
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8 slices bread, toasted
Instructions
Stir tuna, Cheddar cheese, diced jalapeno, mayonnaise, relish, lemon juice, and pepper together in a bowl. Spread tuna mixture on a slice of toast and top with remaining slice to make a sandwich.