Taco Soup - One of my Favorites!!!

2 pounds lean ground beef

1 onion, chopped

1 teaspoon salt

1 teaspoon ground black pepper

1 (15 ounce) can pinto beans

1 (15 ounce) can kidney beans
1 (15 ounce) can black beans
1 (1.25 ounce) package taco seasoning mix

1 cup water

1 (1 ounce) package ranch dressing mix

1 (14.5 ounce) can stewed tomatoes

DIRECTIONS

In a large Dutch oven, brown the beef and chopped onion over medium heat. Drain off any fat. Add chilies, salt and pepper, beans, water, seasoning mixes, and stewed tomatoes to the beef and onion. Bring to a boil. Reduce heat, and simmer for 30 minutes. Top with shredded cheese, and serve with chips.