Fudgy sweet potato brownies with espresso sauce

Grind the Linseed (flaxseed) yourself, or buy it from stores with a good turnover, as ground Linseed turns rancid quite quickly. Ingredients: 1 medium orange sweet potato (400g), peeled chopped 2 tablespoons ground Linseed (Flax meal) ¼ cup (125ml) hot water 180 g (5 ½ ounces) vegan dark chocolate (70 % cocoa), chopped 1 ¼…