3 pounds ground beef
2 onions, chopped
3 (10 ounce) cans diced tomatoes with green chile peppers
2 (15 ounce) cans pinto beans
2 (16 ounce) packages frozen corn kernels
6 serrano peppers, crushed
1 (1.25 ounce) package taco seasoning mix
1 (1 ounce) package ranch dressing mix 

Instructions:

In a large pot over medium heat, cook beef until brown.  Stir in onion and cook a few more minutes.  Drain.

Stir in pinto beans, corn, diced tomatoes with green chiles, serrano peppers, taco seasoning and ranch dressing mix.  Fill the pot with water to come within two inches of the top.  Bring to a boil for 30 minutes, stirring occasionally, then reduce heat and simmer 30 minutes more. 

Source: Allrecipes.com