Spears were arranged in a single layer on parchment paper in
a 23 cm× 23 cm metal cake pan and baked in a reel-type test
baking oven (Model 8/16, National Manufacturing Company,
Lincoln, NE, USA) at 450 °F (230 °C), with the convection function
activated. Cooked spears were immediately removed from
the pan to cool. In 2011, residue was collected from the parchment
paper by rinsing with 50 mL of distilled water.