Roni’s Mac Bar, a restaurant best known for its customizable mac and cheese bowls and grilled cheese sandwiches, is opening in Ames. The restaurant was founded by a husband and wife team in Waco, Texas, and its Ames location will be at 2702 Lincoln Way in the storefront that used to house Big Acai Bowl. “My wife and I had a lot of experience with restaurants beforehand, and then we opened up our own dessert shop,” CEO Frank Senese said. “So we started that… and there was an open [unit] beside us.