This update of a holiday entertaining classic delivers all of the rich flavor with far less of the usual fat. Serve with pita crisps or toasted slices of French bread.
Preheat oven to 400 degrees F.
Place artichoke hearts in the center of a clean kitchen towel; gather up the ends and twist firmly to extract all the moisture.
Combine the artichokes, 1 cup Parmesan cheese, mayonnaise, garlic, lemon zest and cayenne pepper in a food processor. Process until smooth, scraping down the sides of the bowl. Season with salt and black pepper.
Spread the mixture in an even layer in a small ovenproof gratin dish. Sprinkle with the remaining 1 tablespoon Parmesan cheese and bake until the top is golden, about 15 minutes. Serve warm.