Meatloaf Stroganoff

INGREDIENTS

4 tbsp

unsalted butter

large yellow onion, peeled and diced

1 lb

cultivated mushrooms, like button or cremini, cleaned, trimmed and thinly sliced

Kosher salt and freshly ground black pepper,

1 cup

panko bread crumbs

1 1/2 lb

ground beef

large egg, beaten

1 tbsp

plus 1 teaspoon tomato paste

2 tsp

smoked paprika

2 cups

chicken stock, homemade or store-bought

2 tsp

Worcestershire sauce

1 1/2 cups

sour cream

1/2 cup

heavy cream

4 oz

chicken-liver pâté or canned cooked foie gras, optional

3 tbsp

finely chopped parsley