Place the eggplants on a plate and into the oven. Cook for 15-20 mins. To see if the eggplant is cooked, insert a skewer into the flesh; there should be some resistance.
Chop tomatoes into quarters and mix in a bowl with the garlic. Chop parsley roughly and add to the bowl along with torn basil leaves and the olive oil.
Allow eggplant to cool. With a spoon, scoop out the flesh, dice and add to the tomato mixture. Season with salt and pepper.
Turn oven onto full grill setting at 200°C.
Place the eggplant shells on a baking paper lined tray. Spoon the tomato and eggplant mix back into eggplant. Drizzle 3 tbsp of truffle sauce over the eggplant, place 2 slices of provolone cheese over the top and place under the grill. Cook until brown, and then serve.
Truffle Sauce
Melt the butter in a heavy-bottomed saucepan. Stir in the flour and cook, stirring constantly (about 2 mins) until the paste cooks and bubbles (don’t let it turn brown).
Add the hot milk, continuing to stir as the sauce thickens, then bring it to a boil. Add salt and pepper to taste. Lower the heat and stir for 2-3 mins more. Mix in the truffle pecorino.
Remove from the heat. Cover with wax paper or pour a film of milk over it to prevent a skin from forming while cooling.
To Finish
Spoon the tomato and eggplant mix back into eggplant.
Drizzle 3 tbsp of truffle sauce over the eggplant, place 2 slices of provolone cheese over the top and place under the grill.