Chunky Mushroom Crockpot Chili

1 lb hamburger
1 large onion, diced
1 green or red pepper, chopped
3 cloves garlic, minced
1 quart whole tomatoes
15 oz can kidney beans, rinsed
15 oz can black beans, rinsed
8 oz mushrooms, sliced
1 cup Pace Picante Sauce (salsa)
2 8 oz cans tomato sauce
2 Tbsp chili powder
2 teas cumin
1 1/4 teas salt
3/4 teas oregano

Brown hamburger, onion, pepper, and garlic, with some salt and pepper.  Drain and pour into a crockpot.  Add the remaining ingredients to the crockpot.  Cook on low for 4 - 6 hours.