Rachel Zell: The Sauce Boss of Presta Coffee RoastersGrace Trejo / Arizona Daily Star Rachel Zell prepares The Mirage, a passionfruit-guava-matcha seasonal drink at Presta Coffee Roasters, 2502 N. First Ave, July 3, 2023. Grace Trejo / Arizona Daily Star The passionfruit-guava-matcha seasonal drink dubbed The Mirage, is available at Presta Coffee Roasters. Grace Trejo / Arizona Daily Star Rachel Zell is the sauce boss in charge of concocting the seasonal drink menu at Presta Coffee Roasters. Grace Trejo / Arizona Daily Star Presta Coffee Roasters, 2502 N. First Ave Tucson, Ariz. Grace Trejo / Arizona Daily Star