Brighton is about to get a gourmet Italian deli. Eric Gava, former manager at Fenway’s Citizen Public House, will open Mac’s Deli next week (572 Washington St. at Montfern Avenue). He’ll serve sandwiches on fresh Italian braided rolls and stock to-go dinners like chicken parm and sausage with peppers. “I’m trying to cater to young professionals with a real Old World deli,” he says, noting a large cheese and charcuterie selection. For now, the deli is takeout-only. He’ll also open a pizzeria, Nonno’s, in Boston’s West End next month.