<<Disclaimer: Verify this information before applying it to your situation.>>

I found the following 2 sites that have information that will be useful
to us. There is a Cooperative Extension Service in each state and it is
somehow under a US Department of Agriculture program that is suppose to
address various agriculture/food/home/sewing/etc issues that apply to
that state.

The first is the University of Illinois Cooperative Extension Service
home page. They have various pages such as the following:
--substitutions--VERY useful because it tells how to substitute for
ketchup, chili sauce, tomato soup, etc. etc. etc. Included things I have
never seen in other substitution lists.
--food preperation--tells how to make homemade vanilla extract, a gf
falafel recipe, more substitutes for various foods such as eggs, etc
--food preservation--includes how to make no cook freezer jams/jellys,
freezing homemade mashed potatoes/french fries/baked potato, etc

http://www.ag.uiuc.edu/~robsond/solutions/nutrition.html

The second site is the Colorado State Cooperative Extension Service and
it has another excellent page with substitutions:

http://www.colostate.edu/Depts/CoopExt/PUBS/FOODNUT/09329.pdf

Betsey Carus
Baltimore, MD USA