Plum Crumble

750g plums 4 tablespoons golden caster sugar  a large knob of butter 150g flour 100g butter 50g ground almonds (or leave these out and add a little more flour until breadcrumbs) 70g golden caster sugar 50g rolled oats Set the oven at 190˚/Gas 5. Stone and halve the fruit Put them in the baking dish…