Vinaigrette

vinaigrette also known in Europe as French dressing, is probably the most common dressing for salad (barring commercial preparations) in the western world. It is essentially a ‘mixture’ (inverted commas because oil and vinegar are, strictly speaking, immiscible) of olive or other oil with vinegar (or lemon juice or the like or a combination of some vinegar and some lemon juice), plus salt and pepper and optionally plus herbs, shallot, mustard, etc.