2 cups shredded Mexican cheese blend or cheddar cheese, divided
1 can (2-1/4 ounces) sliced ripe olives, drained
Optional: Shredded lettuce, chopped tomatoes and chopped red onion
Preheat oven to 400°. In a Dutch oven, cook beef over medium heat until no longer pink, breaking into crumbles, 8-10 minutes; drain. Stir in taco seasoning. Add tomatoes, water, rice and green chiles; heat through, stirring occasionally.
Meanwhile, prepare cornbread mix according to package directions; stir in corn. Pour half of the batter into a greased 13x9-in. baking dish. Layer with half of the meat mixture, all the sour cream, half of the corn chips and 1 cup cheese. Top with remaining batter, remaining meat mixture, olives and remaining corn chips.
Bake, uncovered, until cornbread is cooked through, 55-60 minutes. Sprinkle with remaining cheese; bake until melted, 3-5 minutes longer. If desired, serve with lettuce, tomatoes and red onion.