This “mimosa” refers not to the popular brunch beverage, instead to the garnish of chopped egg white and egg yolk that brings to mind the mimosa flower. Verjus is an acidic condiment made from underripe wine grapes, look for it with vinegars or in specialty markets.
Extra vinaigrette can be stored in an airtight container in the refrigerator for up to 5 days. It works great as an all-purpose dressing for salads or vegetables.
Extra mayonnaise can be stored in an airtight container in the refrigerator for about 1 week.