INGREDIENTS
4 oz
Button mushrooms
4 oz
Cremini mushrooms
1/2 cup
Leek
1 tsp
Thyme, fresh
8 oz
Yukon gold potato
1
Egg white, large
1
Egg yolk, large
1/3 cup
All-purpose flour
1/2 tsp
Black pepper, freshly ground
1/2 tsp
Kosher salt
1
Cooking spray
1 tbsp
Olive oil
1/2 cup
Panko
1/2 cup
Gruyere cheese
1/4 cup
Parmigiano-reggiano cheese, grated
2 tsp
Water