01 - Set a grill or grill pan to medium-high heat and allow it to reach full temperature before cooking.
02 - In a small bowl, combine the olive oil, minced garlic, dried oregano, sea salt, and black pepper. Whisk until evenly blended.
03 - Using a basting brush, generously apply the marinade to both sides of each eggplant and tomato slice, ensuring even coverage.
04 - Place the eggplant rounds on the grill and cook for 4 to 5 minutes per side until tender with distinct grill marks.
05 - Grill the tomato slices for approximately 2 minutes per side, just until softened but still holding their shape.
06 - Layer the grilled eggplant and tomato slices alternately on a serving platter. Drizzle with balsamic glaze and scatter the basil chiffonade over the top before serving.