The present invention relates to tasty, ready-to-eat, nutritional foods that offer an alternative to appealing but unhealthy foods. The plasma is generated by electrical resistance heating or electron beam vaporization of feedstock. After a coating of carbonized residue has accumulated on the composition-coated surface, both the residue and the composition are easily removed with a mild detergent solution using a sponge or towel. , and the particle comprises a hot-melt adhesive particle having an oil absorption of not less than 50 ml100 g and a hot-melt adhesive particle having an oil absorption of less than 50 ml100 g. Related light emitting device structures are also described. The exhaust is through the adjacent vertical walls of the computer housing.