slow cooker beef and cabbage soup

Ingredients

• 1 pound ground beef
• 1 medium onion, chopped
• 3 cups cabbage, chopped
• 1 cup frozen green beans
• 1 cup celery, chopped
• 1/4 medium green bell pepper, chopped
• 1/4 medium red bell pepper, chopped
• 1 cup carrots, chopped
• 2 cans diced tomatoes with basil, garlic & oregano, (14-1/2 oz. each)
• 1 can italian tomato paste (6 oz)
• 1 teaspoon italian seasoning
• 1-1/2 teaspoon minced garlic
• 4 cups water, boiling
• 1 tablespoon beef base (such as minor's)
• salt and pepper, to taste
• 1 cup minute rice, uncooked