INGREDIENTS
1 1/2 tsp
oil
3/4 cup
onions, minced
1
lbs 93% lean ground beef
1 lb
93% lean ground turkey
1/2
cup dry breadcrumbs
1
large egg
1
large egg white
2 cups
beef broth
1/4
tsp salt
1/8
tsp ground black pepper, to taste
8 oz
sliced mushrooms
2
tbsp all-purpose flour
2 tbsp
tomato paste
1 tsp
red wine vinegar
2
tsp Worcestershire sauce, to taste
1/2
tsp mustard powder
1/4
cup water
chopped parsley for garnish (optional)