Incredible Grill Cheese Sandwiches

Originally from Southern Living; given to me by my lifelong best friend. Comfort food

• Ready In: 1 hr
• Serves: 8

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)

Directions

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