1 lb. Pappardelle's Miso Mushroom Rooster Comb
3 Tbsp. butter
3 Tbsp. flour
2-1/2 cups whole milk
1-1/2 Tbsp. white miso paste
1 tsp Dijon mustard
1 cup shredded Gruyère
1 cup shredded white cheddar
1/2 cup grated Parmesan, plus extra for garnish
8 oz. cremini mushrooms, finely chopped
2 cloves garlic, minced
1/2 tsp black pepper
3/4 cup panko breadcrumbs
2 Tbsp. chopped chives