Johnny Mac's is a relatively new place in Monroeville. I'd never heard of it until one of my co-workers suggested we stop in for lunch after doing a morning's hike in Murrysville.
I tried the Little Mac personal 4-slice pizza and believe me it was every bit as good as those from the places in Squirrel Hill. Just so you know, the Little Mac starts out at $4.99 for a plain cheese pizza but then they charge you a buck a topping. I had mine with pepperoni, mushrooms, and onions.
Their hoagies are big with a half being eight inches. They even have a hamburger hoagie, which looks intriguing. My only nitpick was I wish they had some soups (I didn't see any on the menu).
If I come back here again, I'll try the hoagies.