Heat oven to 350°F. Spray 11x7-inch (2-quart) glass baking dish with cooking spray. In Dutch oven, cook onions and bacon over medium-high heat 4 to 5 minutes, stirring occasionally, until bacon is browned and onions are tender. Remove from heat.
Add cornbread mix and water; mix well. Stir in broccoli. Spread in baking dish.
In small bowl, mix thyme, seasoned salt, garlic powder and red pepper. Rub on turkey tenderloins. Arrange over stuffing mixture; press into stuffing slightly. Cover with foil. Bake covered 1 hour.
Uncover baking dish; bake 10 to 15 minutes longer or until juice of turkey is clear when center of thickest part is cut (170°F). To serve, cut turkey into crosswise slices.