Just a random question for anyone that knows the answer...

I was wondering...

In health class, we're learning about maintaining weight. It's pretty basic stuff: cut the fat, exercise, replace eating with other activities, etc., to avoid gaining weight.

But what if, to get to a healthy weight, I want to gain a few pounds? How would I do that without eating a ton of unhealthy food? Or without exercising a ton (I don't want to look like a wrestler)?

Because...well, I'm about seven pounds beneath what I should be. Nothing too bad. But I just want to gain a *teensy* bit. Just so I would have this mental thing anymore thinking, "Oh, crap. I'm underweight."

So...Any help?