Rinse the beans. Cover with water and soak overnight; drain.
Place the beans, 3 cups water, the onion, celery, carrot, garlic, bay leaf, parsley, thyme, salt, and pepper in a large pot. Bring to a boil; cover and simmer 1 hour.
Preheat the oven to 325 degrees.
Transfer the beans and the liquid in the pot to a bean pot or a 1 1/2-quart casserole prepared with nonstick pan spray. Stir in the margarine and rum. Cover and bake for 2 hours. Remove the cover and bake 30 minutes longer.
Serve topped with orange wedges.
This recipe yields 6 servings. Serving size: 2/3 cup.
Exchanges Per Serving: 2 Starch, 1 Vegetable.
Nutrition Facts: Calories 187; Calories from Fat 23; Fat 3g; Saturated Fat 1g; Cholesterol 0mg; Sodium 147mg; Carbohydrates 33g; Dietary Fiber 8g; Sugars 6g; Protein 10g.