1COMBINE: dressing mix, sour cream, and mayonnais. Set aside. Place 1/2 of the crumbled cornbread in the bottom of a large 3 qt. serving bowl. Top with 1 can drained pinto beans.
2COMBINE: Tomatoes, peppers and onions; layer 1/2 of this mixture over the beans. Layer 1/2 of the cheese, 1/2 can corn and 1/2 of the dressing mix. Repeat layers with remaining ingredients, ending with cheese on top. Cover and chill 3-4 hours before serving. Longer it sits the better it is.