4 Tbsp butter, melted
3/4 cup plus 2 Tbsp grated Parmesan cheese, divided
2-1/2 cups instant potato flakes or buds
1/2 tsp salt
1 cup heavy cream
4 large eggs, separated
2/3 cup chopped baked ham or prosciutto (about 3 oz)
1/4 tsp freshly ground black pepper
1/8 tsp cream of tartar
1/2 cup chopped ripe black olives (optional)
Small basil leaves, for garnish (optional)