Which soy sauces are gluten free?
Tamari is generally the gluten-free option, being made with little or no wheat. Always check the individual pack, since recipes vary between producers.
Are the pasta sauces vegan?
Many are, though some contain cheese or anchovy - puttanesca traditionally does. The filters above will narrow it to vegan lines, and the pack confirms it.
How long does an opened jar keep?
Most say refrigerate after opening and use within three to five days. The jar gives the producer's own figure, which is the one to follow.
What is the difference between shoyu and tamari?
Shoyu is brewed with wheat alongside soya beans. Tamari uses little or none, giving a rounder, less sharp flavour and making it the usual choice for gluten-free cooking.