To make old-fashioned baked beans, wash and sort 1 pound of navy beans, removing any small stones. Place the beans in a large pot, and cover with water, up to 3 inches above the beans, and then cover the pot and soak the beans overnight.
The next day, preheat the oven to 300 degrees Fahrenheit. Drain the beans, and add 6 cups of fresh cold water to the pot. Add 2 teaspoons of baking soda, and then cover the pot and bring the beans to a boil. Reduce the heat, and simmer the beans for 10 minutes. Drain the pot, and reserve the bean water for later.
Add 1/2 cup light molasses, 1/2 cup ketchup, 1/2 cup light brown sugar, 2 teaspoons Worcestershire sauce, 2 teaspoons seasoned salt, 1 teaspoon dry mustard, 1 teaspoon black pepper, 1/2 cup chopped onion and 1/2 lb diced, thick-cut bacon to the pot. Stir the ingredients, and pour them into an oven-proof pot or dish, then cover. Place the pot in the preheated oven, and bake for three to four hours. Check the pot occasionally, and add more bean water, if necessary, to prevent the beans from drying out. Alternatively, use red kidney beans, pinto beans, Great Northern beans or a mixed bean assortment.