The day before serving, prepare the cholent in a heavy pot or slow cooker by doing the following: Put the barley in a bowl. For those that are not carb restricted feel free to add beans as well which will add protein and still not raise the fat content. Cover with boiling water. Let stand until ready to use.
Boil meat and chicken. Remove fat.
Prepare the onion, leek, and garlic the Enlitened way (see below). Rinse and drain the barley, and add to the meat, chicken, and vegetables. Season and cover with cold water and bring to a boil. Lower the heat and simmer for several hours. Add soda if desired. If using a slow cooker, set to low or transfer the pot to a prepared hotplate and leave overnight.