Preheat oven to 350°F Coat a 9" x 13" baking dish with cooking spray.
Prepare pasta according to package directions. Drain, rinse, and drain again; set aside in a large bowl.
Meanwhile, in a large skillet, brown beef and onion over medium heat for 5 minutes; drain off excess liquid. Add to the drained pasta along with spaghetti sauce, picante sauce, ricotta cheese, and 1 cup Mexican cheese blend; stir until well combined.
Spoon into prepared baking dish and bake 25 minutes. Remove from the oven and sprinkle with the remaining 1 cup Mexican cheese blend. Return to the oven and bake 10 minutes, or until cheese melts. Sprinkle with chopped cilantro just before serving.