Make the guacamole and set aside or remove it from the fridge if using store-bought.
Toast the tostadas:
Place the tostadas on a baking sheet and place it in the oven for 3 minutes, remove the tray, flip the tostadas over, and toast them for another 2 minutes. You simply want to warm them up.
Fry the eggs:
Spray or oil a large non-stick pan and cook 2 to 3 eggs at a time, over easy or your preferred doneness.
Assemble:
Spread a tablespoon of guacamole on top of the tostada. Top with shredded lettuce, chopped cilantro, and 2 tablespoons of kidney beans per tostada, top with a fried egg, and a pinch of salt. Repeat this assembly with the remaining guacamole and egg tostadas, serve immediately.