French dressings

The classic French dressing vinaigrette calls for mustard as well as salt and pepper. You can form this into an emulsion by adding the vinegar to the mustard first, turning it into a slack liquid, then slowly incorporating the oil, whisking all the time. The alternative is to measure tried-and-tested quantities and whisk or blend them together just before the salad is to be tossed and served. The resulting mixture will soon separate back into a base of vinegar and seasonings under a pool of