For the dough, knead yeast with 1 tbsp. sugar and let stand for about 5 minutes until the yeast is liquid. Warm the milk lukewarm. Knead 500 g flour, 75 g sugar, milk and yeast with the dough hooks of the hand mixer to a smooth dough. Cover the dough and let it rise in a warm place for about 1 hour
Clean, wash and cut the rhubarb into pieces of about 3 cm. Mix raspberry jam and rhubarb. Melt butter for the crumbles. Mix 300 g flour, 150 g sugar, oat flakes, 50 g almonds and liquid butter with the dough hooks of the hand mixer to make crumbles
Roll out the yeast dough on a greased baking tray (32 x 39 cm) sprinkled with flour. Sprinkle with remaining almonds. Spread rhubarb and crumbles evenly on top. Leave to rise for a further 30 minutes. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for about 35 minutes. Take the cake out of the oven, let it cool down and cut it into pieces
waiting time approx. 1 1/4 hours