So simple!
1 cup small shrimp or shredded crab
2 tablespoons chopped onion
½ cup mayonnaise
1 cup grated cheddar cheese
4 English muffin halves
Mix seafood, onion, mayonnaise, and ½ cup cheddar cheese. Spread on English muffin halves. Top with remaining cheese and broil until warmed through and cheese melts. Makes 4 openface sandwiches.