Heat a skillet with oil in it over medium heat.
When hot, sauté onion, carrot, celery and potato with a sprinkle of salt and pepper for 5 minutes, stirring occasionally.
Add mushrooms, cook 3 more minutes.
Add wine and deglaze pan. Reduce for 1 minute.
Whisk flour in and cook for 1 minute. Add broth and remaining veggies.
Bring to a boil, reduce heat to medium and simmer for 10-12 minutes.
Preheat oven to 375 degrees.
Ladle into 3 oven proof bowls.
Brush egg wash around the edge and stretch a piece of puff pastry around the edges, press gently. Brush the top with egg wash and sprinkle with coarse salt.
Place on a baking sheet and bake for 35 minutes, until golden brown.
Let cool before heating, they’ll be extremely hot!