AUNT ALLENA'S TACO SOUP

1 ½ pound cooked ground beef
1 onion, chopped and cooked with beef
16 oz. corn
16 oz. spicy pintos
16 oz. black beans
16 oz. spicy red beans
1 can rotel
2 cans diced tomatoes
1 ½ cups water
1 pkg. taco seasoning mix
1 pkg. ranch dip mix

Mix all; simmer at least 45 minutes.