Hollandaise sauce
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A classic French emulsion sauce made from butter, egg yolks, and lemon juice, one of the five French mother sauces. Gil references it as part of his food critic persona.
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Mentioned once in She's The Boss.
She's The Boss
Season 3 · Episode 1 · S03E01
“I'll stand behind you and burn holes through her with my "You call this a Hollandaise sauce?!" glare.”