Ramp Au Gratin

INGREDIENTS
3 lbs. gold potatoes, skin on and sliced
2 cups fresh sourdough bread crumbs
1 cup yellow onion, sliced
1 pt. heavy cream
15 oz. whole milk ricotta cheese
5 oz. grated parmesan cheese
2 oz. chopped ramp leaves
2 oz. blanched ramp leaves
1 stick (8 tbsp.) unsalted butter
¼ cup Italian parsley, minced
4 tbsp. garlic, minced
3 tbsp. all-purpose flour
2 tbsp. fresh thyme, minced
1 tbsp. Worcestershire sauce
1 tbsp. fresh lemon juice
1 tsp. Kosher salt
1 tsp. cracked black pepper
½ tsp. ground nutmeg