Mustard (condiment) glucosinolates in mustard plant varieties, and the different isothiocyanates that are produced, make different flavors and intensities. Prepared mustard condiment may also have ingredients giving salty, sour (vinegar), and sweet flavors. Turmeric is often added to commercially prepared mustards, mainly to give them a yellow color. Prepared mustard is sold in glass jars, plastic bottles, or metal squeeze tubes. Because of its antibacterial properties, mustard does not require refrigeration for safety; it will not grow mold, mildew, or harmful bacteria. Mustard can last indefinitely without becoming inedible or harmful, though it may dry out, lose flavor, or brown from oxidation.
Outdoor cooking only rudimentary, commonsensical tools. Additional methods described farther below may be of interest only to those "foodies" who carry their interests into the outdoors for gourmet meals. These advanced methods may require additional equipment or techniques. The most traditional method for outdoor cooking (and indeed the oldest form of cooking known to humanity) is by means of a campfire. Campfires can be used for cooking food by a number of techniques. The techniques for cooking on a campfire are no different from those used for everyday cooking before the invention of stoves or where stoves are still not available. Individuals