Variations On A Theme - Potatoes Gratinee

Madam had her Boxing Day luncheon for the ladies yesterday and I sliced way too many potatoes for the individual Pommes Dauphinois. Instead of wasting the potatoes I just put them in a bowl of water to keep them from darkening and I'll use them today to make a little less rich variation called Pommes Lyonnaise.  The Dauphinois is just layers of potato and Le Gruyere all covered with cream or milk and baked. My version of Lyonnaise loses the cream and uses chicken stock and adds onion to the layers of cheese and potatoes. Sometimes you'll find the recipe is identical to the Dauphinois and just adds the onion. Try them  all and see what you like. I'm being lazy today but there are a bunch on the web just Google "potatoes dauphinois" or "potatoes Lyonnaise" and you'll get plenty of options. Whatever one you pick make sure that it is simply potato, Le Gruyere and milk or cream for the Dauphinois and just potoato, onoin, Le Gruyere, and broth for the Lyonnaise. NO extraneous additions. BTW, don't bother to make either if you aren't going to use real Le Gruyere Swiss cheese.