Make the pastry in the usual way: either by hand or in a food processor by processing the sugar, almonds, flour and butter together then adding the egg.
Once amalgamated, combine in your hands, wrap in clingfilm and chill well. (The pastry is softish.) Then roll out to fit a deep 23cm/9" loose-bottom, buttered flan tin. Prick the base and chill again - for at least 3 hours - preferably overnight.
Sprinkle the semolina over the pastry then scatter over the brambles. Warm the dulce de leche or caramel and spoon over the berries.
Make the crumble topping by mixing the flour, oatmeal and sugar and rub in the butter. Sprinkle over the berries and press down very lightly. Bake at 200C/400F/Gas 6 for 15 minutes then reduce to 180C/350F/Gas 4 for 25 minutes until golden brown. Leave until barely warm before carefully decanting to a plate.
Poach the brambles in the Drambuie, adding sugar to taste. Poach very briefly, only 3-5 minutes, so the berries are still firm. Serve warm - not hot - with the tart and some thick cream.