INGREDIENTS
4
boneless skinless chicken breasts
1 tbsp
butter
1 tbsp
olive oil
1 lb
cremini mushrooms, caps wiped clean and cut 1/4" thick
1
medium onion, diced (about 1 cup)
1/4 cup
dry white wine
1 tbsp
unbleached all-purpose flour
1
medium garlic clove, grated or minced
1 1/2 cups
chicken stock
1/3 cup
sour cream
1
egg yolk
2 tsp
lemon juice (about half a lemon)
2 tbsp
chopped parsley