unsmoked pork belly - watch the video to see (fresh, cut into small pieces)
onion - watch the video to see (finely chopped)
carrot - watch the video to see (finely chopped)
celery - watch the video to see (finely chopped)
beef - watch the video to see (skirt, chuck, brisket, plate, or flank, coarsely ground)
white wine - watch the video to see (red wine can also be used)
tomato pulp - watch the video to see (half a can)
vegetable stock - watch the video to see (optional, for adjusting sauce consistency)
salt - watch the video to see (to taste, for seasoning)