01 - In a mixing bowl, combine shredded chicken with chili powder, cumin, garlic powder, salt, and lime juice. Mix well to coat evenly.
02 - Heat refried beans in a small saucepan over medium heat until smooth and spreadable.
03 - Place tostada shells on a serving platter. Spread a thin layer of warm refried beans on each shell.
04 - Top the beans with a generous portion of the seasoned shredded chicken.
05 - Add lettuce, tomatoes, red onion, cheese, sour cream, cilantro, jalapeño slices, and avocado.
06 - Serve immediately with lime wedges on the side.