Mushroom and Autumn Vegetable Bruschetta

Name: Mushroom and Autumn Vegetable Bruschetta
Prep time: 30 min
Cook time: 24 h
Total time: 24 h
Yield: 24 pieces
Ingredients: 50 g sourdough starter; 100 g strong white bread flour; 100 g filtered water; 300 g water; 400 - 450 g strong white bread flour; 10 g salt; 2 Tbsp olive oil; semolina; 250 g raw cashew nuts; 30 g fresh parsley; 1 lemon; 70 g olive oil; ½ tsp mustard; ½ tsp sweet paprika; 1 tsp salt; 1 pinch ground black pepper; 3 garlic cloves; 200 g leeks; 200 g broccoli; 200 g fresh mushrooms; 100 g Swiss chard; ½ tsp dried chilli flakes; 2 garlic cloves; 30 g watercress; 1 Tbsp olive oil; ½ lemon