Step 1

Toast the bread, then preheat the oven or toaster oven to broil.

Step 2

Arrange 4 slices of toast on an unlined baking sheet. Top each with 2 slices of cheese. Transfer the baking sheet to the oven and broil until the cheese is melted, about 1 minute.

Step 3

Arrange the plain toasted bread slices in a row on a clean cutting board or work surface.  Top each with even portions of the mashed avocado, arugula, tomatoes, a pinch each of salt and pepper, and sprouts.

Step 4

Top with the remaining slices of toast, melted cheese-side down.

Step 5

Slice each sandwich in half and serve.