Step 1

In a bowl, combine tuna, celery, pickles, cilantro, salt, pepper, red pepper flakes and mayonnaise.

Step 2

Add juice from half a lemon and keep aside.

Step 3

Add olive oil to a skillet and heat. Place a slice of bread in the skillet and cook until golden brown.

Step 4

Flip the slice of bread and place 2 American cheese slices on top. Cook until the cheese melts.

Step 5

Place the bread on a plate and add the tuna mixture on top.

Step 6

Add sliced tomatoes and onions on top (optional).

Step 7

Place another slice of bread in the skillet and heat on both sides until golden brown. Cover the sandwich with the slice of bread.

Step 8

Serve and enjoy :)