Yield: 1 serving
2 slices bread
2 teaspoons Dijon mustard
1 ounce cheddar cheese, sliced or shredded
1/2 small apple, sliced
1 1/2 tablespoons chopped walnuts
1 tablespoon butter
1. Spread the mustard on both slices of bread. Add cheese, apple and walnuts to one, and top with the other slice of bread.
2. Melt butter in a small skillet over medium heat. Cook the sandwich, turning once, until both sides are golden brown and the cheese has melted.