Roast Green Chile, Greener approach to a New Mexican staple opens possibilities for sustainable food roasting
— Sandia engineer Ken Armijo sets up a number of infrared cameras and data collection devices before the solar chile roast.
Ken’s father, a chile farmer and roaster, donated several burlap sacks of green chile and his experience assessing properly roasted chile. Ken’s father grows organic, heirloom chile from seed passed down through multiple generations. Afterward, Ken’s team returned the chile roaster to the ground and roasted three more batches of green chile using traditional propane. Propane was slightly faster, taking four minutes to roast washed chiles compared to six minutes for the fastest solar chile roast. With further experimentation, and using more heliostats, Ken thinks they can roast chile even faster than with propane, but he didn’t want to scorch the chile during his first experiments.
Ken presented 14 green chile connoisseurs with both solar-roasted chile and traditional propane-roasted chile and surveyed them on a variety of chile qualities. He found that on average, the respondents favored the solar-roasted chiles by 18% for flavor, 12% for smell and 2% for ease of peeling off the inedible skin. However, the respondents preferred the texture of the propane-roasted by 4%.
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