Prepare all the vegetables
The thickness of the mushrooms serves as a template for the size of the entire vegetable.
Cut the peppers into small rectangles of 1.5 to 2 cm (the thickness of the cooked mushrooms)
Cut the zucchini and eggplant into slices that are just as thick as the mushrooms.
Putting the skewers together
Use the cutting board as a ruler to assemble your skewers as evenly as possible.
Oil with olive oil and season with herbs and garlic
Cook on the plancha, moderately hot, 200° and oiled, the skewers for 7 to 8 minutes on each side. Season to taste and keep warm on the edge of the plancha until ready to serve.