Tuna Salad & Tomato Sandwich

This classic deli-style tuna sandwich is packed with protein and topped with a juicy slice of fresh tomato. This recipe makes one sandwich, but you can easily double or quadruple the recipe to make more. Sweet pickle relish adds a contrast of flavors to the mix, but if you prefer something less sweet, dill pickle relish can be used in its place.

Ingredients

  • 1 (5-ounce) can no-salt-added white tuna in water, drained and flaked
  • 3 tablespoons mayonnaise
  • 2 teaspoons finely chopped fresh dill
  • 2 teaspoons finely chopped fresh chives
  • 1 1/2 teaspoons sweet pickle relish
  • 3/4 teaspoon dijon mustard
  • 1/4 teaspoon ground pepper
  • 2 (1-ounce) slices multigrain bread, lightly toasted
  • 2 large slices tomato (1/4- to 1/2-inch)
  • 2 thin slices red onion
  • 2 leaves butter lettuce