Grapefruit Marmalade - cooking recipe

Ingredients

1 grapefruit
1 orange
1 lemon
sugar
water

Preparation

Wipe fruit and slice very thin, rejecting only seeds and core of grapefruit.
Measure and add 3 times the quantity of water.
Let stand in an earthen dish overnight.
Next morning, boil for 10 minutes.
Leave until next day, then boil for 2 hours.
Measure an equal amount of sugar.
Boil stirring occasionally to prevent burning, about one hour.
Pour into glasses and seal.
Makes about two quarts.