easy thick and rich vegetarian 3-bean chili

Ingredients

• 2 teaspoons vegetable oil
• 1 cup chopped onion
• 1 cup chopped green bell pepper (optional)
• 4 cloves garlic, large/crushed
• 1 can 28 ounce crushed tomatoes
• 1 can pinto beans, rinsed and drained (or 2 cups cooked)
• 1 can blacka beans, rinsed and drained (or 2 cups cooked)
• 1 can cannelli (white kidney beans), rinsed and drained (or 2 cups cooked)
• 1 package 10 ounce frozen corn (or 12 ounce canned)
• 2 tablespoons chili powder (more if desired - i use 4)
• 1 1/2 teaspoons dried oregeno
• 1 teaspoon ground cumin
• 1 teaspoon salt
• 2 teaspoons red wine vinegar