Preparation Heat 2 tablespoons oil in heavy large pot over medium heat. Add onions and sauté until golden, about 8 minutes. Transfer onions to bowl. Heat remaining 1 tablespoon oil in same pot over medium-high heat. Sprinkle chicken with salt and pepper. Add to pot and cook until golden on all sides, about 10 minutes. Pour off excess fat from pot. Sprinkle flour over chicken in pot; turn chicken over. Cook until flour browns lightly, about 2 minutes. Add sautéed onions, white wine and garlic to chicken. Reduce heat; simmer until wine is reduced by half, about 5 minutes. Drain artichoke halves. Add to chicken. Add tomatoes and broth and bring to boil. Reduce heat to low. Cover and simmer until chicken is cooked through and artichokes are tender, about 30 minutes. Spoon off any fat from surface of stew. Using slotted spoon, transfer chicken and artichokes to large platter; tent with foil. Boil sauce in pot until slightly thickened, about 4 minutes. Season to taste with salt and pepper. Pour sauce over chicken and artichokes.
Preparation Heat 2 tablespoons oil in heavy large pot over medium heat. Add onions and sauté until golden, about 8 minutes. Transfer onions to bowl. Heat remaining 1 tablespoon oil in same pot over medium-high heat. Sprinkle chicken with salt and pepper. Add to pot and cook until golden on all sides, about 10 minutes. Pour off excess fat from pot. Sprinkle flour over chicken in pot; turn chicken over. Cook until flour browns lightly, about 2 minutes. Add sautéed onions, white wine and garlic to chicken. Reduce heat; simmer until wine is reduced by half, about 5 minutes. Drain artichoke halves. Add to chicken. Add tomatoes and broth and bring to boil. Reduce heat to low. Cover and simmer until chicken is cooked through and artichokes are tender, about 30 minutes. Spoon off any fat from surface of stew. Using slotted spoon, transfer chicken and artichokes to large platter; tent with foil. Boil sauce in pot until slightly thickened, about 4 minutes. Season to taste with salt and pepper. Pour sauce over chicken and artichokes.