Boston Baked Beans
["4 c. water", "1 lb. dried pea beans", "1 medium onion, sliced", "1/4 lb. salt pork, thinly sliced", "2 Tbsp. brown sugar", "1/2 c. molasses", "1 tsp. salt", "3/4 tsp. dry mustard", "1/8 tsp. pepper"]
["Soak beans in 4 cups water overnight.", "Heat beans to boiling in same water; cover and simmer until tender, 1 to 2 hours.", "Drain beans, reserving liquid."]
["water", "beans", "onion", "salt pork", "brown sugar", "molasses", "salt", "dry mustard", "pepper"]