This is one juicy snack! It can also work as a lunch or appetizer. The tomato acts as a moisture-rich â€œbunâ€ and the wilted green leaves, sautÃ©ed with garlic and olive oil, acts as the filling. Itâ€™s exceptionally light and has bold flavors from the garlic, feta, and balsamic vinegar. The tomato balances it all. Enjoy!