A classic French sauce starring hard-boiled eggs, gribiche gets its briny kick from cornichons and capers. It's great over steamed new potatoes or poached leeks or asparagus, and on bagels with lox.
Whisk together Dijon, vinegar, and oil. Stir in eggs, parsley, cornichons, and capers. Season with salt and pepper.
For hard-cooked eggs that are creamy and tender, not rubbery, place eggs in a saucepan and cover with cold water by 1 inch. Bring to a boil over high heat; cover and remove from heat. Let stand 8 minutes, then transfer to an ice-water bath.