Lentil + Mushroom Wellington with Mushroom Gravy - Dinner With Julie

Ingredients

• 1/4 cup + 1 Tbsp butter or vegan margarine (divided, optional)
• olive or other vegetable oil, for cooking
• 1 medium onion, finely chopped
• 1-1 1/2 lbs fresh mushrooms (button, cremini, brown, oyster or a combination)
• 1-2 garlic cloves, crushed
• 2 tsp fresh thyme leaves (pull them off the stems)
• 1-2 tsp chopped fresh rosemary
• salt and freshly ground pepper, to taste
• 1 1/2 cups cooked or canned, drained lentils
• 4 oz soft goat cheese (optional)
• 1 pkg puff pastry, thawed
• 1 egg (optional)
• 2 Tbsp all-purpose flour
• 1 1/2-2 cups vegetable, mushroom or onion stock
• 1 tsp soy sauce
• 2 Tbsp nutritional yeast (optional)