1/2 cup unsalted butter
1 1/2 cups sugar
4 eggs
Juice of 3 lemons
1 1/2 teaspoons grated lemon peel

Microwave the butter on high in a 2-quart microwave-safe measuring cup just until melted. Add the sugar, eggs, lemon juice and lemon peel and blend. Microwave on High for 4 minutes and whisk. Microwave on Medium-High for 4 minutes and whisk. Microwave on Medium High for 4 minutes longer and whisk. Continue to microwave until thickened. Let stand until cool. Serve with freshly baked scones or as a filling for lemon tarts.