() is a traditional Welsh stew, made with smoked bacon, stock, potatoes and other vegetables.
The vegetables used are typically potatoes, onions, and carrots sliced lengthwise. Although more usually made with smoked bacon, minced beef may be used as a substitute. As a stew, it is unique in that all the main ingredients are cut into slices, and layered into a large frying pan so they lie flat. The ingredients are then simmered slowly until the potatoes become tender, and then seasoned with salt and pepper.
The dish is commonly served on a plate (as opposed to a bowl) with crusty bread. Perhaps oddly, for a Welsh dish, it is also normally served with Worcestershire sauce on the side.
A similar dish, called Tatws Popty () or Tatws Pobdu, is made using chunky vegetables, and cooked in an oven.