A soft almond sponge studded with tart rhubarb - the first proper bake of the season.
Preheat the oven to 170C. Butter and line a 22cm round tin.
Cream the butter and sugar until light and fluffy.
Beat in the eggs one at a time, then the almond extract.
Fold in the flour and ground almonds until just combined.
Spoon half the batter into the tin, scatter over half the rhubarb, then top with the remaining batter and rhubarb.
Scatter with flaked almonds and demerara sugar.
Bake 45-50 minutes until golden and a skewer comes out clean.
Cool in the tin 15 minutes before turning out.