Sauté the finely chopped onions with the garlic in a little olive oil.
When the onion is translucent, add the peeled, sliced carrots.
Put the cut-up tail pieces in a pot with the diced tomatoes, season with salt and pepper, add the bay leaves, cloves and crushed saffron, then top with the sautéed onion and carrot base.
Cook for 10 minutes, stirring constantly, and when the meat browns, pour in the wine.
Simmer over low heat for about 3 hours, until the meat is falling-apart tender.
Dice and fry the potatoes, and add them to the stew for the last 15 minutes of cooking.