Pre-heat the oven to 180 degrees C

Cut the plums in half and remove the stone

Grease a large shallow dish ( a lasagne type dish is perfect)

Place the stoned plums in the bottom and sprinkle with the sugar

Place the flour in a large bowl and rub in the butter

Stir in the ground almonds and sugar

Sprinkle evenly on top of the plums

Place in the oven for 40-45 minutes until the crumble is brown and the fruit is bubbling through

Serve with ice cream or cream