Wash and dry the zucchini well. Cut them lengthwise into slices of medium thickness. Grill them on a previously heated grill, season with salt, oil and herbs to taste. Take the Greek yogurt and spread it on the zucchini, add one or two slices of cooked ham, close the zucchini forming a roll, then pin through with a toothpick. Serve your rolls together with wholemeal breadsticks. Prepare the strawberries and berries, rinse them well under water and place them in a bowl.