01 - Preheat a grill or grill pan to medium-high heat, approximately 400°F.
02 - In a small bowl, combine the olive oil, minced garlic, dried oregano, sea salt, and freshly ground black pepper. Whisk until evenly blended.
03 - Using a basting brush, generously coat both sides of each eggplant and tomato slice with the marinade mixture, ensuring even coverage.
04 - Place the eggplant slices on the hot grill and cook for 4 to 5 minutes per side until fork-tender with pronounced grill marks. Transfer to a platter.
05 - Grill the tomato slices for approximately 2 minutes per side until just softened but still holding their shape. Remove carefully with tongs.
06 - Arrange the grilled eggplant and tomato slices on a serving platter in alternating layers. Drizzle with balsamic glaze and garnish with fresh basil chiffonade before serving.