I like to season fish with olive oil, salt, pepper, and grated lemon zest before cooking, and then serve it with a tempting sauce boasting fresh herbs. This is the place to use a peppery extra-virgin oil.
Place the mahi mahi and eggplant slices on a baking sheet. Brush with olive oil on both sides and sprinkle with salt and pepper. Sprinkle the fish with 1 tablespoon of the lemon zest. Let marinate while preparing the sauce.
In a small bowl, mix the ¼ cup olive oil, shallot, parsley, lemon juice, thyme, jalapeño, and remaining 1 teaspoon lemon zest. Season to ta