Grandma's Slow Cooker Vegetarian Chili

Ingredients

• 1 (19 ounce) can black bean soup
• 1 (15 ounce) can kidney beans, rinsed and drained
• 1 (15 ounce) can garbanzo beans, rinsed and drained
• 1 (16 ounce) can vegetarian baked beans
• 1 (14.5 ounce) can chopped tomatoes in puree
• 1 (15 ounce) can whole kernel corn, drained
• 1 onion, chopped
• 1 green bell pepper, chopped
• 2 stalks celery, chopped
• 2 cloves garlic, chopped
• 1 tablespoon chili powder, or to taste
• 1 tablespoon dried parsley
• 1 tablespoon dried oregano
• 1 tablespoon dried basil