Meat lovers! If using protein, cook separately and add to baked flatbreads in Step 5. If using diced chicken, pat dry and season with pinch of salt and pepper. Place a medium non-stick pan over medium-high heat and add 2 tsp. olive oil. Add diced chicken to hot pan and stir occasionally until chicken browns and reaches minimum internal temperature, 5-7 minutes. If using bacon, line a plate with a paper towel. Place a medium non-stick pan over medium heat and add bacon to hot pan. Flip occasionally until crisp, 6-8 minutes. Transfer to towel-lined plate to remove excess oil. Crumble, and top tostadas with bacon.