Photo: Jennifer Causey; Food Styling: Chelsea Zimmer; Prop Styling: Thom Driver
How to Make It
Heat olive oil and butter in a large skillet over medium heat. Add onions; cook 8 minutes, stirring occasionally. Reduce heat to medium-low; cook until light amber-colored, about 45 minutes, stirring occasionally. Stir in sherry, salt, and pepper. Increase heat to medium; cook until liquid is absorbed, about 3 minutes.