In Caponata, eggplants are traditionally deep fried to gain more flavor.
Deep fried eggplant cubes are added to the other ingredients only at the end.
In a frying pan pour a little bit of extra virgin olive oil, and start sautee the red onion first, then red pepper and, at last, the zucchini.
After a 3 or 4 minutes minutes we can add the other ingredients: capers, sultanas, pine nuts, sugar, white vinegar, pistachios, and the deep fried eggplant.
Once the Caponata is ready, put it at rest in a warm place, and move on to the Tuna steak.
The tuna steak should be at least 1 inch thick to be correctly seared.
To prepare the steak, season the steak with salt and pepper.
In a frying pan put some Italian extra virgin olive oil, crushed garlic (to be removed later) and sear the tuna steak with 1 minute cooking time per side approx.
When the tuna steak is seared, it can be served as a whole steak, or cut into slices.
As a final preparation and serving tip, use a tin stamp to serve the caponata on the side of the dish, while serving the sliced seared tuna steak on the other side.