Preheat a skillet over medium-high heat. Spread 2-3 tablespoons of peanut butter over each tortilla. Top half of each tortilla with 1/3 cup sliced strawberries, crowding the berries very closely together.
Place one or two quesadillas (depending on your skillet's size) into the preheated skillet and cook on the first side for just a minute or two, checking frequently.