Beef Stew with Potatoes and Parsnips

Preheat oven to 350 degrees. In a large bowl, season flour with salt and pepper. Coat beef in flour, shaking off excess. In a large heavy ovenproof pot, heat 2 tablespoons oil over medium. In batches, brown beef on all sides, about 5 minutes per batch. Transfer to a plate.

Add remaining tablespoon oil, onion, garlic, and tomato paste and saute until fragrant, 2 minutes. Add 3 cups water and bring to a boil, scraping up browned bits. Add beef and any accumulated juices, potatoes, parsnips, 1 1/2 teaspoons salt, and 1/2 teaspoon pepper. Cover, transfer to oven, and cook until meat is fork-tender, 1 hour. Stir in vinegar and serve.