Ingredient:

• 3 medium sweet potatoes, peeled and chopped into 1/2-in. cubes
• 1/2 cup chopped sweet onion
• 1 teaspoon chili powder
• 1 teaspoon ground cumin
• 1/2 teaspoon smoked paprika
• 1/2 teaspoon garlic powder
• 1/2 teaspoon salt
• 1/4 teaspoon onion powder
• 1/4 teaspoon pepper
• 1/8 teaspoon cayenne pepper
• 1 tablespoon olive oil
• 1 can (15 ounces) refried black beans
• 12 flour tortillas (6 inches)
• 1 medium ripe avocado, peeled, sliced
• 1/4 cup finely chopped red onion
• 1/4 cup chopped fresh cilantro
• 6 lime wedges