Spray skillet with cooking spray; heat to medium and saute onion, garlic, jalapeno for about 5 mins. Add beans and corn and mix. Add tomato and cilantro and stir, cooking for about 2 minutes. Spoon some of the mixture onto each tortilla. Add mashed avocado. Fold them over, spray with cooking spray, and place on baking sheet. Bake for 5 to 7 mins, or until they turn lightly brown.