Garza was inspired by the play Doña Rosita’s Jalapeño Kitchen. At first glance, it would seem problematic at best to consider opening a vegan, gluten-free, Tex-Mex restaurant on Nogalitos Street just north of I-90. This is hardcore old-school country. But that’s exactly the point, says Fred Anthony Garza, whose Vegeria on upper Broadway, a “grassroots…