Scampi Pizza

1 pizza crust

Sauce
1 tablespoon butter
1/4 cup finely chopped onion
1 1/2 teaspoons finely chopped garlic
1 cup dry white wine
2 cups heavy cream
1/2 teaspoon salt
Pinch of nutmeg
Pinch of white pepper
Pinch of cayenne
1 egg yolk

Toppings
2 cups small shrimp (boiled in lightly salted water)
Chopped artichoke hearts
Roasted garlic
Monterey jack cheese
Parmesan cheese

Saut