Huevos con Migas
In a glass jar combine 2 cups heavy cream and 1/4 cup buttermilk. Cover jar with several layers of cheesecloth or a dish towel. Let stand 24 hours at room temperature (between 70°F and 75°F). If your home is chilly, set the jar on top of the refrigerator, which tends to be warmer, or in the oven with the oven light on. After 24 hours, replace the cheesecloth with the lid of the jar. Refrigerate 24 hours before using. Store in the refrigerator up to 10 days.