Beef Consommé

Prepare clarification mixture Pulse chopped onion, carrot, and celery in a food processor or mini-chopper until finely chopped. Whisk egg whites until frothy, then add ground beef and chopped vegetables and mix well with your hands. Cover and chill in the refrigerator for at least 1 hour (or overnight).

Make onion brûlé Sear the remaining onion wedge in a small cast-iron skillet over medium-high heat on both cut sides until blackened, then coarsely chop.

Clarify stock Pour stock into a stockpot. Remove the clarification mixture from the refrigerator and add the browned onion and the tomato, then add this mixture to the pot. Set over medium-high heat and whisk briskly until thoroughly incorporated with the stock. Use a wooden spoon to stir at a slower speed until the solids rise to the top, then stop stirring. Continue cooking until frothy bubbles start to form around the sides of the raft. Reduce heat to medium-low and use a spoon or a ladle to make a hole in the raft so the consommé can bubble freely, and you can see the color and clarity of the broth. At this point the broth should be clear; further simmering is to develop more flavor.