Chocolate Cream Pie - Easy & Delicious!

Ingredients

• 1 9-inch pie crust, homemade or store bought, cooked and cooled
• 1/2 cup sugar
• 1/4 cup cornstarch
• 1/2 teaspoon salt
• 4 egg yolks
• 2 cups milk
• 1 cup half and half
• 1 teaspoon vanilla extract
• 7 ounces semi-sweet chocolate chips or chunks
• 2 Tablespoons butter
• 1 cup chilled heavy cream
• 1 Tablespoon sugar
• Grated chocolate