► Prepare your grill (or preheat the oven to 400F). Toss the zucchini and eggplant rounds in olive oil, salt and chili flakes if desired. Brush whole portobellos with olive oil and season with salt.

► Grill vegetables until charred and tender.

► Build burgers - stacking lettuce, portobello, eggplant, zucchini, cheese slices and a spoonful of confiture in between the split brioche buns.