1-Initial Preparation: First, prepare all ingredients by shredding the cooked chicken and chopping vegetables. Preheat oven to 450°F to crisp tostada shells, as this high heat helps achieve that perfect crunch. In a small bowl, mix together the seasonings to get your flavors ready.

2-Seasoning and Cooking the Chicken: Second, season the shredded chicken with spices such as cumin, chili powder, and garlic powder to enhance flavor, using the exact mix of 2 teaspoons chili powder, 1 teaspoon ground cumin, and others for a bold taste. Third, place the 2 medium boneless skinless chicken breasts on a rimmed baking sheet, drizzle with 1 tablespoon olive oil, and sprinkle the spice mixture evenly on both sides. Bake for 15-18 minutes until it reaches 165°F, then let it rest for 10 minutes before shredding.

3-Assembling Your Tostadas: Fourth, while the chicken rests, heat the 1 (15 ounce) can refried beans in a skillet over medium heat for easy spreading. Fifth, spread a thin layer of warm refried beans on each of the 8 tostada shells to act as a base. Top the beans with the shredded chicken, then layer on shredded romaine lettuce, diced tomatoes, finely diced red onion, diced avocado, crumbled cotija cheese, and diced fresh cilantro for a colorful finish.

4-Final Touches and Serving: Sixth, sprinkle shredded cheese on top and add optional sauces or garnishes to personalize. For the Pesto Chicken Salad lovers, think of this as a crunchy twist on familiar flavors. Finally, serve immediately while the shells are crisp, drizzling with optional hot sauce, sour cream, and lime juice if desired. This method ensures every bite is fresh and tasty, with the chicken’s juicy texture shining through.