- 1 medium ripe tomato, cored and finely chopped
- 2 teaspoons fresh lemon juice
- 1 tablespoon extra-virgin olive oil
- Salt and freshly ground black pepper to taste
- Two 6-inch lengths store-bought or Four-Hour Baguettes
- 1 cup baby arugula or other baby greens, washed and dried
- ¼ cup very thinly sliced sweet onion, such as Maui or Vidalia
- One 4-ounce can oil-packed sardines, drained well
- 1½ ounces Grana Padana or Parmesan cheese, shaved with a vegetable peeler
- Heat a panini or sandwich press according to the manufacturer’s instructions.
- Combine the tomato, lemon juice, olive oil, salt, and pepper to taste in a small bowl
- Slice the baguette pieces in half lengthwise and spoon the tomatoes on the bottom half of each baguette. Arrange some of the greens on top of the tomatoes. Arrange the sliced onion on top of the greens. Arrange the sardines on top of the onions. Top with the cheese. Top each sandwich with the top half of the baguette.
- Put the sandwiches on the press, pull the top down, and cook until they are browned and crisp, 4 to 7 minutes, depending on how hot your machine is. Carefully remove from the press and serve immediately.