Ham, Cheese, and Apple Sandwich Recipe

Make the apple butter: Combine apples, apple cider vinegar, brown sugar, and salt in a heavy- bottomed pot; bring to a simmer. Cover pot partially and cook until apples are soft, about 20 to 30 minutes.

Remove from heat and stir in calamansi juice and cinnamon. Purée mixture in batches in a blender until smooth.

Return mixture to pot and simmer over low heat, uncovered, stirring every few minutes until thickened and dark, about 1 hour. Let cool completely then transfer to an airtight container. Refrigerate for up to 3 days.

Heat a frying pan or grill pan over low heat. Brush one side of each bread slice with melted butter.

Sprinkle grated cheese evenly over the unbuttered sides of 3 bread slices, spreading cheese to the edges. Top with ham and apple slices.

Spread 1 tablespoon apple butter on each of the unbuttered sides of the remaining bread slices. Cover sandwiches, apple-butter side down.

Place sandwich on the heated pan. Place a piece of parchment paper on top of the sandwich and press down on it using a heavy pan. Cook until golden brown, about 2 to 3 minutes. Flip sandwich and press down on it again with the heavy pan. Cook until golden brown.

Let sandwich cool slightly before packing in a lunch container.