How to Make It
Light a grill. Arrange the eggplant and tomato slices on a rimmed baking sheet and brush on both sides with 1/2 cup of the olive oil. Season with salt and pepper and sprinkle with the oregano. Grill the tomato slices over a hot fire for about 1 minute per side, or until they are charred but still hold their shape. Transfer to a platter. Grill the eggplant slices over a medium-hot fire for about 5 minutes per side or until lightly charred and tender.
In a bowl, combine the capers and caper juice with the vinegar, lemon zest and the remaining 2 tablespoons of olive oil. Season with salt and pepper.
To assemble the salad, overlap alternating grilled tomato and eggplant slices on a large platter. Tuck the basil leaves between the slices. Drizzle the dressing on top and serve.