Lentil Soup With Spinach
["1 c. sliced onions", "2 Tbsp. olive or vegetable oil", "1/2 lb. dry lentils", "1 lb. frozen, chopped spinach", "1 clove garlic, finely chopped", "3 c. water", "1 tsp. salt", "1 tsp. grated lemon peel", "2 tsp. lemon juice"]
["Cook and stir onions and garlic in oil in 3-quart saucepan over medium heat until onions are tender.", "Stir in water, lentils and salt.", "Heat to boiling.", "Reduce heat.", "Cover and simmer 1 hour.", "Stir in spinach, lemon peel and lemon juice.", "Cover and simmer until spinach is tender, about 5 minutes."]
["onions", "olive", "dry lentils", "frozen", "clove garlic", "water", "salt", "lemon juice"]