If you are keen to try unusual formats, I strongly recommend Pescetto (https://www.tripadvisor.com/Restaurant_Review-g187849-d4994733-Reviews-Pescetto-Milan_Lombardy.html?m=19905).

It looks like a fish shop, with a fish counter where you pick what you want and say how you want it to be cooked. The fish is fantastic.

Be aware the place is usually quite busy and you may be expected to leave soon after you are finished.