Waffle Sandwich with Cheese, Spinach and Spicy Mustard Recipe

  • 1 roma (plum) tomato, thinly sliced
  • salt and ground black pepper to taste
  • 2 teaspoons butter, softened
  • 4 thickly-sliced pieces multigrain bread
  • 1 teaspoon spicy brown mustard
  • 1 cup fresh spinach, or to taste
  • 4 slices part-skim mozzarella cheese
  • 2 teaspoons chopped sweet onion
  1. Preheat a waffle iron according to manufacturer's instructions.
  2. Arrange tomato slices on a work surface, pouring off any excess juice. Season tomato slices with salt and pepper.
  3. Spread 1/2 teaspoon butter onto 1 side of each bread slice. Lay 1 bread slice, butter-side down, in the hot waffle iron. Spread 1/2 teaspoon mustard onto bread slice in waffle iron; top with 1/4 cup spinach, 2 slices mozzarella cheese, 1 teaspoon onion, half the tomato slices, and 1/4 cup spinach, respectively. Lay 1 slice bread, butter-side up, atop the spinach layer.
  4. Close waffle iron and toast sandwich until lightly browned, about 2 minutes. Repeat with remaining ingredients.