Step 1

Lightly toast each slice of bread.

Step 2

While the bread is toasting, make the tuna salad by combining the tuna, mayonnaise, dill, onion flakes, garlic powder, and paprika in a medium bowl.

Step 3

Place the toasted bread on a baking sheet. Distribute the avocado slices among the 4 pieces of bread.

Step 4

Place the tomato slices on top of the avocado.

Step 5

Distribute the tuna salad on top of the tomato.

Step 6

Place a slice of cheese on top of the tuna.

Step 7

Place the baking sheet under the broiler on high for 3-4 minutes until the sandwich is hot and the cheese is melted.