INGREDIENTS
1 lb
Mushrooms, white
3/4 lb
Potatoes
2
Yellow onions
1
Egg
2 1/4 cups
Flour + more
1 tsp
Salt
1
Salt and freshly ground black pepper
4 tbsp
Butter, unsalted
2 cups
Plain or greek yogurt, full fat
1
Sour cream or full-fat or greek yogurt