This protein-packed weeknight dinner is ready in less than 30 minutes.

Then youll fry eggs to your preference, and spike a generous amount of sour cream with lime juice.

This recipe was developed by Adam Dolge.

Black Bean and Eggs-Over-Easy Tostadas

Photo:Fred Hardy

Add onion; cook, stirring occasionally, until tender, about 6 minutes.

Add cumin and 1/2 teaspoon salt; cook, stirring constantly, until fragrant, about 1 minute.

Add beans and 2/3 cup water; bring to a simmer.

Cook, covered, until beans are tender, about 5 minutes.

Remove from heat and mash with a potato masher into a coarse paste.

Meanwhile, stir together sour cream, lime juice, and 1/4 teaspoon salt in a medium bowl.

Heat 1 tablespoon oil in a large nonstick skillet over medium.

Transfer to a plate and sprinkle with 1/4 teaspoon salt.

Repeat with remaining 1 tablespoon oil, 4 eggs, and 1/4 teaspoon salt.

Spread 3 tablespoons bean mixture on each tostada.

Top each tostada with 1 egg and avocado slices.

Drizzle with sour cream mixture and top with lettuce and radishes.

Serve with lime wedges.