Remoulade is a variant of mayonnaise and so you *can* use premade mayonnaise in this recipe (remove all of the mayonnaise ingredients). This recipe make a *LOT* of mayo, it can be kept for a while, or just cut the recipe with now ill effect. The only measurements that *must* be spot on in this recipe are the oil and eggs, everything else is a 'some'. However homemade mayonnaise is *delicious* and so much different than the weird stuff you buy in a jar. Many people think mayonnaise is unhealthy because of the eggs--to be sure to be completely safe you should use pasteurized egg/egg products. However professional kitchens have been making mayonnaise like this for *years* and the risk of an unhealthy egg is fairly low. Give her a shot, I'm sure you'll love it!