In A Skillet, Cook Turkey And Onion Until Meat Is No Longer Pink; Drain If Necessary. Stir In Taco Seasoning, Water, Zucchini, Tomatoes And Corn; Bring To A Boil. Add Rice. Reduce Heat; Cover And Simmer For 5 Minutes Or Until Rice Is Tender And Liquid Is Absorbed. Sprinkle With Cheese; Cover And Let Stand Until The Cheese Is Melted.