Pudding Streusel Cakes with Strawberries and Rhubarb

Name: Pudding Streusel Cakes with Strawberries and Rhubarb
Prep time: 45 min
Cook time: 1 h
Total time: 1 h 45 min
Cuisine: European, German
Ingredients: 350 g (12.4 oz) rhubarb; 150 g (5.3 oz) strawberries; 2 tbsp sugar; 1 pinch baking soda; 250 g (8.8 oz) white flour - spelt or wheat; 40 g (2 tbsp) vegan butter, melted; 40 g (2 tbsp) sugar; 1/2 pk. dry active yeast; 140 ml (1(2 cup plus 1 tbsp) soy milk, lukewarm; 250 ml (1 cup) soy milk; 1/2 pk. (2 slightly heaped tbsp) pudding powder, vanilla; 2 tbsp sugar; 120 g (4.3 oz) white flour - spelt or wheat; 65 g (2.3 oz) vegan butter; 65 g (2.3 oz) sugar; 1/2 - 1 tsp water; powdered sugar; a few drops water