Cheesy Veggie Quesadillas

-  1 cup thinly sliced onion -  1 large zucchini, halved lengthwise and thinly sliced -  1/8 tsp. salt -  20 sprays I Can't Believe It's Not Butter!® Spray Original -  8 (6-in.) fajita size low fat flour tortillas -  2 cups reduced fat shredded cheddar cheese (about 8 oz.) -  1 cup finely chopped tomatoes

Preheat 10-inch nonstick skillet over medium-high heat. Add onion, zucchini and salt, then spray with I Can't Believe It's Not Butter!® Spray Original. Cook covered, stirring occasionally, 8 minutes or until tender.

Evenly divide onion mixture onto 4 tortillas, then evenly top each with cheese. Top with remaining tortillas.

Cook quesadillas in 12-inch skillet over medium-high heat, one at a time, turning once, 2 minutes or until cheese is melted. Cut into wedges and garnish with chopped tomatoes.