Feiersténgszalot, meaning firestones salad, is a traditional Luxembourgish meat salad that is made by combining pieces of beef with hard-boiled eggs, shallots, cornichons, and mustard vinaigrette. The vinaigrette typically consists of mustard, oil, red wine vinegar, tarragon, parsley, chives, salt, and pepper, but it can also be enhanced with crème fraîche if desired.