Slow Cooker Beef Stew

Name: Slow Cooker Beef Stew
Ingredients: 3 tablespoons butter; 2 pounds beef chuck, cut into cubes; 3 large carrots, peeled and chopped; 3 celery ribs, chopped; 1 large turnip, peeled and chopped; 3 parsnips, peeled and chopped; 1 large onion, peeled and chopped; 6 cloves garlic, peeled and chopped; 2 bay leaves; leaves from 1 sprig fresh rosemary (about 1 tablespoon); 1 tablespoon fresh thyme leaves; 2 tablespoons minced fresh parsley, plus more for serving; 1/2 teaspoon smoked paprika; 1/2 teaspoon ground chipotle; 3 tablespoons balsamic vinegar, plus more for serving; 28 oz. can organic diced tomatoes; 2-3 cups beef or chicken stock, preferably homemade; course sea salt to taste