These spinach and feta empanadas are a delicious and flavorful option. The filling is made with sautéed spinach, onions, garlic, and crumbled feta cheese. A touch of lemon juice adds brightness to the filling. The dough is made with flour, butter, and water, and is rolled out and filled with the spinach and feta mixture. The empanadas are then baked until golden and crispy. Serve them hot with a side of tzatziki sauce for dipping. These empanadas are perfect for a Mediterranean-inspired meal or as a tasty snack.