- Preheat your oven to 375°F. Place the tostada shells on a baking sheet and warm them in the oven for about 5 minutes until they are crispy. 
- In a small bowl, mix the shredded rotisserie chicken with lime juice, chili powder, salt, and pepper. 
- Spread about 2 tablespoons of refried beans on each tostada shell. 
- Top the beans with a generous portion of the seasoned chicken. 
- Add shredded lettuce, diced tomatoes, and avocado slices on top of the chicken. 
- Sprinkle crumbled queso fresco over each tostada. 
- Drizzle sour cream and salsa on top of the tostadas before serving. 
- Serve immediately and enjoy!