Beef Stew with Root Vegetables

Name: Beef Stew with Root Vegetables
Ingredients: 3 tablespoons olive oil; 1 tablespoon butter; 2 pounds beef stew meat; 3 cloves garlic, minced; 1 medium onion, diced; 1 can or bottle beer; 4 cups beef broth, more as needed; 1 tablespoon Worcestershire sauce; 2 to 3 tablespoons tomato paste; 1 1/2 teaspoons sugar; 1/2 teaspoon paprika; 1/2 teaspoon kosher salt; Freshly ground black pepper; 2 carrots, roughly sliced; 2 parsnips, roughly sliced; 1 small turnip, roughly sliced; 2 tablespoons all-purpose flour, optional; Minced fresh parsley, for garnish