Preheat oven to 400 degrees. Lightly spray (2) 9x13" pans with non-stick spray. Set aside.
Rinse and trim the zucchini ends. Slice the zucchini vertically. Using a melon-baller or spoon, hallow out the zucchini. Place the zucchini in the pan, and set aside.
For the filling: To a large skillet add the olive oil and heat over medium-high heat. Saute the onion and pepper for about 5 minutes, or until the red onions are nearly translucent. Add the ground turkey to the onion and pepper and brown until cooked through.
Once the turkey is no longer pink, and cooked through, add the beans, corn, salsa, and seasoning. Stir. Continue to heat over medium-high heat until the filling comes to a low simmer. Remove from heat.
Spoon in the filling to each zucchini. Once all the zucchini are filling, top with a sprinkling of cheese.
Bake the zucchini at 400 degrees for 25 minutes.
Remove from oven and let cool for about 5-10 minutes before serving. Top with cilantro, if desired.