Notes: Sherry is a type of fortified wine originally from southern Spain. Don't use the “cooking sherry” sold in many supermarkets--it can be surprisingly high in sodium. Instead, purchase dry sherry that's sold with other fortified wines in your wine or liquor store.
Miso is fermented soybean paste made by inoculating a mixture of soybeans, salt and grains (usually barley or rice) with koji, a beneficial mold. Aged for up to 3 years, miso is undeniably salty, but a little goes a long way.
People with celiac disease or gluten-sensitivity should use soy sauces that are labeled "gluten-free," as soy sauce may contain wheat or other gluten-containing sweeteners and flavors.