Once your veggies are prepared, start your soup by sautéing your onions in the bottom of a large pot. Grate in your garlic, and sauté until the onions are softened.
Next, you’ll add the ground lamb to the pot and season it with salt and pepper. Once your lamb is halfway browned, add your carrots and celery, and keep cooking until veggies are tender.
Next, you’ll stir in the oregano, Worcestershire sauce, and potato cubes, cooking an additional couple of minutes for potatoes to soften. Then, you'll add beef stock and stir it in.