STEP 1Prepare BBQ chickenAdd cooked, shredded chicken to a medium bowl. Pour in BBQ sauce and mix until combined.
STEP 2AssembleAdd 1/2 cup BBQ chicken mixture on top of each tortilla. Sprinkle 1/4 cup shredded cheese to each. Top with red onions.
STEP 3Oven instructionsPlace tostadas on a parchment lined baking tray and bake at 350 degrees for 6-8 minutes.
STEP 4Air fryer instructionsPlace tostada in the basket or tray of an air fryer. Air fry at 350 degrees for 6 minutes.
STEP 5Grill and griddle instructionsHeat grill to medium high heat. Place tostada directly on the grill or griddle. Close the lid and let cook until cheese is melted (about 3-4 minutes).