Herbed mushrooms with pearl barley and roasted hazelnuts

Name: Herbed mushrooms with pearl barley and roasted hazelnuts
Prep time: 25 min
Cook time: 13 h 25 min
Total time: 13 h 25 min
Yield: 4 portions
Ingredients: 4 sprigs fresh flat-leaf parsley; 30 g fresh chives; 4 sprigs fresh thyme; 120 g unsalted butter; 200 g pearl barley; 20 g dried porcini mushrooms; 400 g boiling water; 100 g Parmesan cheese; 1 brown onion; 2 garlic cloves; 80 g fresh portobello mushrooms; 2 tbsp olive oil; 1 sprig fresh basil; 2 sprigs fresh thyme; ¼ tsp sea salt; ¼ tsp ground black pepper; 1000 g water; 4 fresh portobello mushrooms; sea salt; ground black pepper; 60 g fresh baby spinach leaves; 30 g hazelnuts