Preheat the oven to 500° F. Pat the fillet dry, season it with salt and pepper, and in a small roasting pan roast it in the middle of the oven for 23 minutes, or until it registers 125° F. on a meat thermometer for rare meat. Transfer the fillet to a cutting board and let it cool. The fillet may be roasted 1 day in advance and kept covered and chilled. In a blender puree the artichoke hearts and the garlic with the vinegar, the oil, and salt and pepper to taste and transfer the puree to a bowl. The puree may be made 3 days in advance and kept covered and chilled. Spread each slice of toast with some of the artichoke puree, top the puree with some of the arugula, and divide the fillet, sliced very thin, among the crostini . Top the crostini with the Parmesan curls. Makes 36 crostini. beef 28