It is a curiosity of the greengage that a fruit so unprepossessing to look at should be one of the tastiest types of plum. It is green and marks easily. However the taste is wonderful.
If you can get hold of some of them, and they are too marked for the fruit bowl, then try one of the following recipes (from Beryl Wood's classic work "Let's Preserve It")
GREENGAGE JAM
2 lbs. greengages (stalked and stoned), 1½ lb. sugar, water.
Put fruit in pan with small quantity of water; bring to boil and simmer gently 15 mins.; add sugar, stirring till dissolved; bring to boil and boil gently to set; pot and cover at once.
GREENGAGE JELLY
2 lbs. greengages, ½ pt. water, sugar.
Halve greengages, simmer in water (a little more may be needed if fruit is very firm) till soft; strain through jelly bag; put juice in pan with 1 1b. sugar per pt. liquid; stir til sugar dissolved; then boil steadily to set; pot and cover at once.
GREENGAGE AND APPLE JAM
2 lbs. stoned greengages, 1 Ib. cooking apples (when peeled and cored), ¼ pt. water, 3 lbs. sugar. Put fruit in pan with water, simmer till soft; add sugar, stirring till dissolved; boil steadily to set; pot and cover at once. (If greengages are very ripe, allow apple to cook for short time first.)
GREENGAGE ANB RED PLUM JAM
1 lb. stoned greengages, 1 lb. stoned red plums, 2 lbs. sugar, ¼ pt. water. Proceed as for greengage jam.