Simple crunchy tostadas spread with seasoned refried beans and topped with fresh cheese and salsa. A vegetarian, fiber-rich snack that makes an easy, family-friendly appetizer or side dish.
Heat olive oil in a skillet over medium heat, then add refried beans and stir for 2-3 minutes with salt and pepper to warm and season.
Place tostada shells on a baking sheet and heat in a 350°F oven for 3-4 minutes to restore crispness, watching closely to prevent burning.
Finely dice tomato, onion, and avocado; toss with cilantro and lime juice to make a fresh salsa, letting it sit for several minutes for flavor melding.
Spread the warm refried beans evenly over each crispy tostada shell, ensuring the beans cover the surface but do not overflow.
Top with crumbled queso fresco and spoonfuls of salsa, serving immediately to preserve the tostada's crunch.