What you will need
Sweet shortcrust pastry (500g flour, 100g icing sugar, 250g butter, zest of a lemon, 2 eggs, milk)
100g vanilla sugar
1/2 tsp mixed spice
1 tsp cornflour in 1 tbsp water
285g blanched whole almonds
50g plain flour
1 vanilla pod
250g unsalted butter
250g caster sugar
First and foremost I made the pastry. I have a history of failure with pastry. Stupid stuff but I persevered. Practice makes perfect after all. Sieve flour and icing sugar together and then rub the cold butter into the flour and sugar until it looks like breadcrumbs. Then mix in the lemon zest. Beat the eggs and then add them along with the milk to the dry mixture to bring it together. Put it in cling film and then refrigerate for at least half an hour.
Grease a nice big loose bottomed cake tin. Extract the pastry from the fridge and line the tin with it. This process pretty much always makes beads of sweat form on my brow. It is a tense time in the kitchen if I am lining pastry. I'm frowning a little bit now even.
Anyway. To make the frangipane. Blitz the blanched almonds until you get a fine powder and then mix this with the flour. Try your best to get the seeds out of the vanilla pod and mix those in a mixer with the butter and sugar until creamy. Put the almonds and flour into the mixer with the eggs until smooth. Refrigerate this mixture for at least half an hour.
Preheat the oven to 180C/350F/gas 4.
Jam time. To make the plum jam to line the bottom of the tart give yourself longer than you might think. It's not a quick process. The before and after are both above. Halve the plums and remove the stones. Chop half up and heat in a pan with the sugar and mixed spice. Cook until it looks like jam and then add the cornflour and water.
While you're waiting...and waiting...for this to thicken, macerate the other half of the plums with some icing sugar.All That I'm Eating
Let us ignore and gloss over the holes in the pastry case and concentrate on the pretty jam that's covering the bottom. Thank goodness the jam isn't transparent. Then spoon over the frangipane mixture and push the left over plums into the fluffy frangipane.