and mustard sandwiches offer a straightforward yet vibrant option for gathering guests around the table. This dish relies on a minimal number of ingredients to achieve a balanced flavor profile and an appealing presentation. The recipe suggests combining fresh rye bread with sweet mustard, spicy onion, and tender herring fillet to create an ideal snack for any meal.[1]
Beyond the classic sandwich, the source proposes serving the filling inside mini tartlets made from shortcrust or puff pastry. Alternatively, the ingredients can be layered into square pieces of bread and arranged on a large board without skewers. These variations allow the food to be presented as an open tartlet or a sandwich set, ensuring the herring stays in place thanks to the mustard and onion.[1]