Pick one of each. An admission that something is overrated doesn't mean you dislike it:

Underrated: Mushrooms.

I genuinely cannot believe that people dislike them. Great panfriend with garlic.

Great breakfast tip: Grill a large mushroom for breakfast, and put it in a lightly buttered bap, like a burger. Great stuff.

Overrated: Steak.

I like steak a lot, but it's put on a pedestal too often. Can't get why people go out for a meal and buy one- much better to just do it how you like at home for a quarter of the price.

Your go