LuAnn's White Chili with Hominy

I return to this hearty vegetarian white chili recipe again and again. It is one of the healthier recipes I've developed, that everyone seems to truly enjoy!!

1 tablespoon olive oil
1 large onion, chopped
1 tablespoon minced garlic
2 (4 ounce) cans diced green chiles
2 tablespoons ground cumin
1 tablespoon chili powder
1 teaspoon dried oregano
4 (15 ounce) cans great northern beans, divided use
2 cups water
1 tablespoon vegetarian chicken-style seasoning/bouillon
2 (15 ounce) cans hominy, (white preferred) rinsed and drained
1/4 cup chopped fresh cilantro

Garnish
4 ounces shredded reduced fat Monterey
    jack cheese (1 cup), optional
1/2 cup fat-free sour cream
1/4 cup sliced green onions, optional

In a large saucepan over medium-high heat, heat the oil. Saut