O'Hare estimates that half of his business each day comes from sandwiches and that 60 percent of those sales are grilled cheese. The second most popular sandwich is the "Cheesy Joe," which is a mixture of American cheese and Sloppy Joe mix.

"That's been a really popular item," O'Hare said.

Cheesy grill offers creamy tomato soup ($1.79 for a cup, $2.19 for a large), chicken noodle ($1.99 / $2.39) and chili ($2.79 / $3.49).

"People love the tomato soup," O'Hare said. And the chili is really a good deal. I went with a higher quality chili because, to be honest, I tried some of the less expensive ones and I didn't like them at all. I won't serve something that I don't like."

Though people may not crave soup in warmer weather, O'Hare isn't anticipating a drop-off in sales. After getting request from customers in his first few weeks, he added a shake / slushee machine.

"We're finding that when people don't order soup, they will order fries or a shake," he said. "They're substituting something else. But, we don't think it's going to be a dropoff. And we have plenty of cold days in Wisconsin."

For O'Hare and his wife, Penny, who are considering adding more locations, quality is the most important part of the restaurant equation.

"Our biggest thing is getting the quality right," he said. "We use the best French fries you can buy. We use real cheddar cheese sauce on the fries and on the macaroni and cheese. One of the best compliments we've had so far came from someone who said that our macaroni and cheese was as good Noodles and Co. I like Noodles a lot. That was a real compliment.'

So far, compliments have outpaced complaints. A sign on the wall reminds visitors "Fresh food takes time. We think you'll agree, it's worth it."

"Quality is the big thing," O'Hare said. "The French fries go down with your order. We make each sandwich fresh. Even it's not busy, it can take three or four or even five minutes to get your order. If it's crowded, it can be eight to 10 minutes.

"We're a fast, casual concept restaurant. But, we're not fast food. Most people understand that."

"In a way, it's like Culver's. You go there for a burger and you have to pull up and wait. Or, you wait for it inside. I'm a fan of Culver's. I like their burgers. But, I'd rather wait a little longer for a sandwich that is fresh than get one that right away that has been sitting on a shelf."

If the first few months are an indication, O'Hare's plan is working.

"From a business standpoint, I am today where I thought I would be after six to eight months," he said. "People are starting to figure us out."