6 medium Yukon gold potatoes, peeled and diced
Kosher salt
2 tablespoons extra-virgin olive oil
1 large onion, diced
3 large carrots, cut into 1/2-inch chunks
2 stalks celery, cut into 1/2-inch chunks
1 bunch baby turnips, halved or quartered if large
6 cloves garlic, minced
Freshly ground pepper
1/2 bunch fresh parsley, leaves chopped (stems reserved)
1 1/2 tablespoons Worcestershire sauce
5 tablespoons unsalted butter
3/4 cup chopped veggie burgers or vegetarian protein crumbles
2/3 cup milk or half-and-half
Grated parmesan cheese, for sprinkling (optional)