Prepare the vegetables Dice the eggplant, chop the onion, bell pepper, and celery. Mince the garlic. Roast the eggplant in the oven until golden and slightly charred to add smoky depth, or sauté it in olive oil until tender and caramelized, developing a rich, hearty texture.

Cook the base In a large pan, sauté onions, garlic, and bell peppers in olive oil until soft and aromatic. Add chopped tomatoes and celery, cooking until the vegetables meld into a chunky, vibrant mixture. Stir occasionally to prevent sticking and develop all flavors.

Finalize the flavors Mix in the roasted eggplant, olives, capers, pine nuts, and raisins. Add vinegar and sugar to achieve the classic sweet-and-sour balance. Simmer gently, allowing the flavors to blend and the dish to thicken slightly while remaining chunky and rustic.

Taste and adjust Season with salt and freshly ground pepper. Add fresh basil before serving to introduce aromatic freshness. Let the caponata rest for at least 30 minutes; it tastes even better after the flavors have mingled.