Orange-Grapefruit Marmalade

• 3 large grapefruits
• 1 orange
• 1 lime
• 1 1/2 cups water
• 1/4 teaspoon baking soda
• 5 cups sugar
• 3 ounces liquid fruit pectin, such as Certo

1. Remove peels from fruit and scrape off excess pith. Cut peels into fine strips.
2. In saucepan, combine peels, baking soda and 1 1/2 cups water. Bring to boiling, cover and simmer 20 minutes.
3. Meanwhile, remove white membrane from fruit and section, working over bowl to catch juices. Discard seeds.
4. In 8-10 quart Dutch oven, combine sections, juice and undrained peel. Cover and simmer 10 minutes.
5. Measure 3 cups cooked fruit mixture; add sugar and mix well.
6. Bring to full rolling boil and boil, uncovered, 1 minute.
7. Remove from heat, stir in liquid pectin and skim off foam with metal spoon. Stir and skim for 10 minutes.
8. Pour into hot, sterilized jars and seal.

grapefruits, orange, lime, water, baking soda, sugar, liquid fruit pectin

Taken from www.food.com/recipe/orange-grapefruit-marmalade-311045 (may not work)