Drain and squeeze out the excess liquid from 1 block tofu using your hands or a clean kitchen towel.
Cube the tofu and gently mix it in a bowl with 2-3 Tbsp vegan mayonnaise and 1/2 Tbsp black salt.
Sandwich Assembly
Gather 3 slices bread. Slice 1 avocado and 1 tomato and sprinkle some salt and pepper. Lay avocado on one slice of bread, then top that with the tofu mixture.
Stack on a slice of bread and layer on the tomato.
Spread a small amount of vegan mayo on the last slice and top it. Serve and enjoy!
Notes
Normally the crust is cut off the sandwich, then wrapped in shrink wrap and sliced for better packaging, but not necessary if you want to avoid waste and plastic.