Incredible Grill Cheese Sandwiches - cooking recipe

Ingredients

3/4 cup shredded monterey jack cheese
3/4 cup shredded sharp cheddar cheese
3/4 cup shredded swiss cheese
1/4 cup minced onion
1/3 cup mayonnaise
1 tablespoon Dijon mustard
16 sandwich bread, slices
1/2 cup butter or 1/2 cup margarine, softened
1/2 lb thinly sliced ham (optional)

Preparation

Combine first 6 ingredients.
Spread 1 side of bread slices evenly with butter.
Turn 8 slices buttered side down; spread evenly with cheese mixture.
Top with ham, if desired, and remaining bread slices, buttered side up.
In a large nonstick skillet over medium heat, cook sandwiches two at a time until golden, turning once.