3 cups pinto beans, rinsed 15 cups beef broth 4 slices thick cut bacon 3 garlic cloves, peeled whole 1/2 white onion, halved 1 serrano chile, halved 1/4 tsp oregano 1/8 tsp pepper 1/8 tsp comino Add all ingredients to a large stock pot Bring to a boil Reduce to simmer Cover loosely Simmer for 2 1/2 hours, or until beans are tender