Truckloads of agricultural byproducts arrive from regional farms. Several types of farm waste are stored in large hoppers and then mixed in different ratios to meet specified material properties. A patented continuous steam pasteurization system cleans the crop wastes of any mold or bacterial contamination that may have come from the field. The pasteurized substrate is inoculated with mycelium, and molded into a form. These forms are loaded into pallet racks, and growth occurs indoors for about a week. Lastly, the parts are popped out and dried in order to deactivate the growth. Finished parts are shipped to customers.