GasAmerica welcomes the first franchise unit of The New Miami Subs Grill, originator of the fast casual restaurant concept. The 2,000-square-foot Miami Grill, joins the 4,000-square-foot Convenience Mart Stop, located at one of GasAmerica’s Greenfield, Ind., locations. “We’ve looked at a number of food concepts and found the New Miami Subs Grill concept the best…