3 tbsp. butter, divided 1 onion, thinly sliced 4 sprigs thyme, divided kosher salt Freshly ground black pepper 2 8-oz. tubes Crescent Rolls 1/3 c. Grainy mustard 1 lb. deli roast beef 8 slices provolone 1 egg, beaten with 1 tsp water for egg wash 1 tbsp. chopped parsley, plus more for garnish 1 tsp.…… Continue Reading
