FROM JULIA CHILDS KITCHEN RECIPES

Steps:

• In a small saute pan, over high heat, saute the shallots in the butter until soft, about 5 minutes. Divide the meat into 4 portions. One at a time, flatten each by chopping and spreading the meat with light strokes of your chefs knife. Season each with salt, pepper and 1/2 teaspoon of the shallots. Blend into the meat, chopping and turning it as you shape the portions into 4 1/2 to 5-inch round patties, 1/4-inch thick. Toast the hamburger buns and distribute them to your guests. Suggest that they dress the bottom halves of their rolls as they wish while you cook the burgers. Lightly dust the surface of a large, hot saute pan, with salt. When the pan is very hot, but not smoking, lay a patty in the pan. Rapidly add a second burger. Brown the meat, about 20 seconds. Turn patties to other side. Cook until done, about 1 minute. Remove cooked burgers to a warm platter. Repeat process with 2 remaining burgers. Place finished burgers onto guests buns as quickly as possible so they can add their finishing touches.

Steps:

• Heat oven to 400 degrees and place a rack at the middle level. In a large saucepan, combine onions and 2 tablespoons olive oil and stir to coat over low heat. Sprinkle lightly with salt. At a gentle simmer, cook uncovered until onions are softened and lightly golden, 10 to 15 minutes, stirring often. Do not brown; lower the heat if necessary. When done, fold in tomatoes just until heated through. Set aside.
• In a small food processor or a mortar, add the anchovies — anywhere from 6 to 12 fillets, depending on their size and your taste. Add garlic, herbs and a dozen grinds of pepper. Add 2 tablespoons olive oil (or use the oil from the anchovy can, if you like). Crush or pulse together into a chunky paste, thinning with oil as needed to make a loose, fluid mixture.
• In a medium-size baking dish, spread a quarter of the onion-tomato mixture. On top, arrange half the potato slices, then half the anchovy mixture. Add half the remaining onion-tomato mixture. Build one more layer with remaining potato slices, anchovy mixture and onion-tomato mixture. Sprinkle cheese on top and drizzle with olive oil.
• If the dish is very full, place on a baking sheet. Transfer to oven and bake, uncovered, until potatoes are tender and have absorbed all of the juices in the bottom of the dish, 40 to 50 minutes. Test by tasting a bit of potato; it should be soft all the way through, with no raw taste. If the top is browning too fast, cover very loosely with a sheet of foil. If the top is not brown enough when the potatoes are cooked, broil briefly until deliciously glazed.
• Serve gratin hot or warm. Can be cooled and reheated later the same day, but do not refrigerate.