Prepare lemon curd: Combine sugar, zest and eggs in a saucepan over low to medium heat, stirring with a whisk. Stir in lemon juice and butter. Cook for 5 minutes, or until the mixture thinly coats the back of a spoon. Stir constantly with whisk while cooking. Cool mixture. Cover and chill. The curd will thicken as it cools.
Prepare pizza: Preheat oven to 350 degrees F. Press dough into 12-inch pizza pan coated with cooking spray. Bake 12 minutes, or until golden brown.
Preheat broiler. Spread melted jam over crust. Spread lemon curd over jam. Arrange fruits on top. Sprinkle sugar over fruit. Broil 3 minutes.
Slice into wedges and serve.
They sell wonderful lemon curd already prepared in a jar. Check your local market or specialty food shop.
If you don't intend to serve this dessert immediately, be sure to refrigerate it until ready to slice and serve.