Lentil Salad
["1 ( 16 oz.) pkg. lentils", "1 c. finely chopped onions (or more, if desired)", "3 Tbsp. prepared mustard", "juice of 1 or 1 1/2 lemons", "tarragon vinegar (to achieve desired acidity)", "sugar", "chives", "oil"]
["Check lentils and remove any little stones.", "In a 4-quart saucepan, wash lentils several times in 2 quarts of cold water to skim off debris.", "Use same saucepan to soak lentils overnight in 2 quarts of cold water."]
["lentils", "onions", "mustard", "lemons", "tarragon vinegar", "sugar", "chives", "oil"]