3 celery root potato puree roasted Recipes

whole garlic head, chopped peeled baking potato (about 1 3/4 lb), chopped peeled turnip, chopped peeled celeriac (celery root; about 3/4 lb), chopped onion, butter, whipping cream, white wine vinegar, salt, freshly ground black pepper

celery roots (celeriac; 1 3/4 lb total), trimmed, peeled, cut into 1-inch cubes (about 8 cups), russet potatoes, peeled, cut into 3/4-inch cubes (about 3 cups), low-salt chicken broth, whole milk, garlic cloves, peeled, fresh thyme sprigs, fresh bay leaf, unsalted butter, divided, jerusalem artichokes (also called sunchokes), scrubbed, extra-virgin olive oil, chopped fresh thyme (for garnish )