Dave's Mexican Veggie Tacos

Step 1
Make filling: Heat oil in a large skillet over medium heat; cook and stir carrots in hot oil until lightly browned, about 5 minutes. Add potato; cook and stir until lightly browned and mostly tender, 5 to 10 minutes. Add leeks and onion; cook and stir until onion is lightly browned, 5 to 10 minutes.

Step 2
Mix in sweet potato, beans, cumin, oregano, chili powder, cayenne pepper, salt, and pepper; cook and stir until sweet potato is tender, about 10 minutes. Remove from heat and transfer sweet potato mixture to a bowl, scraping the skillet clean with a rubber spatula.

Step 3
Assemble tacos: Heat each tortilla in the same skillet over medium heat until warmed, about 30 seconds per side. Spread mashed avocado onto each warmed tortilla; top with sweet potato mixture, queso fresco, salsa, cilantro, and lime juice.