Tuna Melts on English Muffins

Preheat the oven to 450 degrees F (230 degrees C).

Melt butter in a small frying pan over low heat. Add onion and garlic and saute over low heat until soft and translucent, 5 to 7 minutes. Stir in seafood seasoning, cilantro, onion powder, salt, and pepper. Remove from heat.

Combine tuna and mayonnaise in a bowl. Add the sauteed mixture from the frying pan and blend well with a fork.

Place all 6 halved English muffins on a cookie sheet. Spoon on tuna mixture, dividing it evenly between each muffin. Top each with a slice of tomato; add a slice of American cheese.

Bake in the preheated oven until cheese is melted, about 5 minutes.