Mushroom Wellington

Name: Mushroom Wellington
Prep time: 30 min
Cook time: 2 h 20 min
Total time: 2 h 20 min
Yield: 6 portions
Ingredients: 2 Tbsp olive oil; 4 portobello mushrooms; 600 g onions; 10 g fresh thyme leaves; 2 tsp fine sea salt; 1 tsp ground black pepper; 300 g fresh baby spinach; 1 sheet puff pastry, ready-rolled; 1 Tbsp Dijon mustard; 1 Tbsp dairy-free milk of choice; 1 tsp neutral oil; 1 tsp maple syrup; 100 g shallots; 1 garlic clove; 1 tsp olive oil; 300 g chestnut mushrooms; 1 tsp dried rosemary; 1 tsp fine sea salt; 1 pinch ground black pepper; 120 g dry white wine; 1 tsp Dijon mustard; 250 g dairy-free cream