• Step 1: Preheat your oven to 400°F (200°C). Arrange the tostada shells on a baking sheet.
• Step 2: In a medium bowl, combine the shredded chicken and barbecue sauce. Stir until the chicken is evenly coated.
• Step 3: Spoon the BBQ chicken mixture onto the tostada shells, dividing it evenly.
• Step 4: Sprinkle the shredded cheddar cheese over the chicken.
• Step 5: Bake the tostadas in the preheated oven for 8-10 minutes, or until the cheese is melted and the edges are crispy.
• Step 6: Remove the tostadas from the oven and top with diced tomatoes, red onion, and chopped cilantro (if using).
• Step 7: Serve the BBQ chicken tostadas warm, with lime wedges on the side.