baked rice pudding recipe

Ingredients: 3/4 cup uncooked white rice (such as medium or long grain) 2 cups milk 1 cup heavy cream 1/2 cup granulated sugar 1 teaspoon vanilla extract 1/2 teaspoon ground cinnamon 1/4 teaspoon ground nutmeg 1/4 cup raisins (optional) 2 tablespoons unsalted butter, cut into small pieces Additional ground cinnamon for garnish (optional)