Spray a large skillet with nonfat cooking spray and set over medium high heat. Add in onion, garlic, ad bell pepper, and sauté for about 8-10 minutes.
Add in zucchini, corn and black beans, cumin, chili powder, lime juice, salt and pepper. Stir and sauté until zucchini are tender.
Warm tortillas over a gas burner or on a skillet. Divide vegetables among 8 tortillas. Top each with salsa, cilantro and the queso fresco. Serve immediately.