
Warm the refried beans with the cumin and a splash of water in a saucepan over medium, about 5 minutes, stirring until smooth.
Warm the tostada shells on a sheet pan at 350°F for 3-4 minutes so they're extra crisp.
Shred the lettuce, dice the tomatoes, and mash the avocados with lime juice and salt.
Spread each tostada with beans, then top with lettuce, tomato, guacamole and salsa.
Put out jalapeños for the grown-ups and let kids top their own.
Photo: DinnerDrop