Preheat oven to 450°F (230°C).
Mix melted butter with lemon juice and zest and brush on pizza crusts.
Spread toppings on crusts then sprinkle with cheese. Salt and pepper to taste.
Bake pizzas on middle rack of oven for 5 to 8 minutes or until crusts and cheese are golden.
Serve with a carrot and almond salad drizzled with balsamic vinaigrette.