1Heat oven to 400°F. In 12-inch skillet, cook ground beef over medium-high heat, stirring occasionally, until thoroughly cooked; drain. Stir in salsa, kidney beans, tomatoes, corn, chili powder and cumin. Cook 3 to 4 minutes, stirring occasionally, until thoroughly heated.
2Meanwhile, make cornbread as directed on pouch, using milk. Spoon cornbread batter around outside edge of ungreased 12x8-inch (2-quart) glass baking dish. Spoon hot beef mixture into center. (Casserole will be full.)
3Bake 18 minutes. Sprinkle with cheese; bake 4 to 5 minutes longer or until cheese is melted and cornbread is deep golden brown. Sprinkle with green onion just before serving.