Mushroom Galette

Name: Mushroom Galette
Prep time: 10 min
Cook time: 35 min
Total time: 45 min
Ingredients: 600 g portobello mushrooms; 3/4 cup Merlot (or other full bodied dry red wine); 1 large brown onion (halved and thinly sliced); 3 tbsp olive oil or vegan butter; 1/2 tbsp vegetable stock powder; salt and pepper to taste; 2 sheets frozen puff pastry; vegan feta; rocket/arugula; balsamic glaze; sea salt flakes