Speedy beef taco soup

Ingredients:

1 pound ground beef or turkey
1 onion, chopped
1 can Ro-Tel tomatoes with chiles
1 can corn, drained
1 can pinto beans
1 can water
1 envelope taco seasoning mix
1 envelope Hidden Valley Ranch Dressing

Preparation:

Brown the meat and drain.
Mix beef with remaining ingredients.
Simmer for 45 minutes.
Serve topped with grated Jack cheese and sour cream.
Serve with warm tortillas.