Put the anchovies, garlic, and 1/4 teaspoon of the salt in a chilled medium-size mixing bowl and, with a fork, mash to make a paste. Add the capers and mash them into the anchovy paste. Add the egg and whisk it into the anchovy paste with the fork. Whisk in the mustard. Slowly drizzle in the olive oil, whisking constantly until incorporated. Whisk in the remaining 1/2 teaspoon salt, the black pepper, and Worcestershire. Add the beef and mix well with a wooden spoon.
To serve, mound the beef tartare in the center of a large cold serving platter, arrange the toast points around it, and mound the garnishes around the rim of the platter.
Yield: about 8 appetizer servings
Salmonella warning: Let’s talk about egg safety because I don’t want any of you out there to get sick. I personally love homemade fresh mayonnaise and I make it with fresh—and I mean FRESH—raw eggs. I’ve never had any trouble, but I want you to take some precautions. Always purchase your eggs from a reputable source, a place you can trust with your life. Don’t use eggs after the expiration date on the carton. Don’t go leaving your eggs in the backseat of your car while you’re out and about, and once you get home, keep the eggs in the refrigerator. I use eggs pretty quickly, so I don’t have to worry about keeping them too long at home. But I suppose there’s a tiny risk some nasty old salmonella could sneak into some eggs, so just be cautious about serving young kids or the elderly or to people who have health problems. Okay?