Halve the onion and cut into rings. Mix Knorr Fix with water and tomato juice. Pluck the cheese into small pieces.
Alternately layer kidney beans, corn, onions and coarsely crumbled tortilla chips in a round casserole dish. Finish with whole tortilla chips.
Pour the sauce over the casserole and cover with pieces of cheese. Bake in the oven at 170 degrees for about 20 minutes.