Prepare a rich beef or chicken stock and bring it to a gentle simmer.
In a separate bowl, whisk egg whites with finely chopped vegetables and lean ground meat (optional) to create the clarification mixture.
Stir the mixture into the stock and simmer gently without boiling.
As the egg whites cook, they will form a "raft" that traps impurities.
Simmer for 45–60 minutes, allowing the consommé to clarify.
Carefully strain the liquid through a fine mesh sieve or cheesecloth without disturbing the raft.
Season with salt and pepper, then serve hot with fresh herbs if desired.