Start the meat in cold water and skim
25 minCut the bone-in meat into large, palm-sized pieces and put them in a wide pot. Pour in 3 liters of cold water and heat over medium. As the water approaches a simmer, gray-brown foam will gather on the surface; skim it off and repeat four or five times, until the broth is clear. Do not add salt yet; it makes the foam harder to skim.