For the dough, put flour, almonds, 150 g sugar, 1 pinch of salt, 2 eggs, butter in pieces and 2 tablespoons of cold water in a bowl. First knead with the dough hooks of the mixer then quickly with your hands to a smooth dough. Approx. 2⁄3 Pour the dough into a greased tart tin with a raised base (26 cm Ø) and dust with flour. Press on the base and rim. Chill for about 30 minutes.
For the grid, roll out the rest of the dough on some flour (approx. 28 cm Ø). Cut into strips about 2 cm wide. Weave on baking paper to the grid. Pull the velvet baking paper onto a plate. Chill for about 30 minutes.
For the filling, wash, clean and chop the strawberries and rhubarb. Mix pudding powder, 50 g sugar and 4 tbsp. juice. Boil up the rest of the juice. Stir in the pudding powder, bring to the boil and simmer for about 1 minute. Remove from heat and stir in the fruit. Leave to cool and fill into the mould.
Slide the grid from the baking paper onto the filling. Press down the rim. Whisk the egg yolk and brush the grid with it. Sprinkle with sugar crystals. Bake in a hot oven (electric cooker: 200 °C/circulating air: 175 °C/gas: see manufacturer) on the bottom shelf for about 1 hour. Let it cool down. Serve with vanilla ice cream.
At www.kochen-und-geniessen.de/gitter you will find detailed step-by-step instructions.