Three-Bean Enchilada Chili

Ingredients

• 1 tablespoon vegetable oil
• 1 cup chopped onion
• 1 cup green bell pepper, chopped
• 2 cups crushed tomatoes
• 1 (15 ounce) can pinto beans, rinsed and drained
• 1 (15 ounce) can dark red kidney beans, rinsed and drained
• 1 (15 ounce) can black beans, rinsed and drained
• 1 (10 ounce) can enchilada sauce
• 1 teaspoon dried oregano leaves
• tortilla chips
• shredded cheddar cheese