01 -
Heat the chicken broth along with sage in a stock pot, then start on the garlic prep.
02 -
Peel garlic, cut cloves in half, and remove the inner stems. Boil for 3-4 minutes, drain, and mash until smooth.
03 -
Stir the mashed garlic into the simmering broth, cooking gently for 10 minutes.
04 -
Use a hand blender to mix together mustard, egg yolk, oil, and salt until creamy. Add the egg white only if needed.
05 -
Optional: strain the liquid for a smoother finish. Slowly mix some hot soup into the mayo, then pour back into the pot. Keep warm, but don't let it boil.