Boston Style Baked Beans

1 pound dried navy beans
2 Onions; chopped
1/2 cup dark brown sugar
1/4 cup molasses
1/3 cup ketchup
1/4 pound bacon, diced
1 tablespoon salt
1 1/2 teaspoon dry mustard
1/4 teaspoon pepper
1 cup drained pineapple chunks (optional)

Soak beans in water overnight. Drain and put all ingredients in cooker. Add 1 cup water and stir to blend. Cover and cook on low 10 to 12 hours. Can also spice it up with a few cloves of garlic, a half teaspoon of powdered ginger, and a good dash of Worcestershire sauce.

Optional: Stir in 1 cup drained pineapple chunks during the last hour of cooking.