Can I make the ranchero sauce ahead of time?
Yes. Prepare the sauce up to 2 days ahead and refrigerate in an airtight container. Reheat gently on the stovetop before serving.
How do I keep tostadas crispy when topping them?
Assemble just before serving. Fry tostadas fresh, then quickly add guacamole and beans (which act as a moisture barrier), then top with the warm egg and sauce.
What if I don't have serrano peppers?
Use an additional jalapeño or substitute with Thai chili peppers for similar heat. Adjust quantity to taste.
Can I bake or air-fry the tostadas instead of pan-frying?
Yes. Brush tortillas lightly with oil and bake at 400°F for 8–10 minutes until crispy, or air-fry at 375°F for 6–8 minutes, flipping halfway.
How many servings does this make?
The recipe yields 4 servings (typically 1–2 tostadas per person). Scale ingredients proportionally for more servings.