In a medium skillet saute onion and garlic on medium-low heat until tender, about 4 minutes. Add sauteed onion and garlic along with all other ingredients to the slow cooker. Recommend 5-7 quart slow cooker.
Cover and cook on low 8 hours. Cooking time may vary depending on how tender you like your green beans. Southern-style green beans are typically cooked until they are falling apart.