Salmon Wellington A Showstopping Dinner

Ingredients

• 1 tbsp olive oil (15 ml)
• 1 shallot, finely chopped (about 1/2 cup, 50g)
• 8 oz cremini mushrooms, finely chopped (225g)
• 1 clove garlic, minced
• 1 tbsp fresh thyme leaves, chopped
• Salt and freshly ground black pepper to taste
• 1 tbsp butter, unsalted (15g)
• 5 oz baby spinach (140g)
• Pinch of nutmeg
• 4 (6 oz) salmon fillets, skin removed, pin bones removed (170g each)
• 1 sheet (14.1 oz) puff pastry, thawed (400g)
• 1 egg, beaten
• Optional: Dijon mustard
• Optional: Lemon wedges