By Yanni from Morton Grove, IL
Start with your health department. Also, our state university has a program that provides food science training (see link below). I believe some people have an established manufacturer make the product according to one's recipes.
You will probably have to rent time in a commercial kitchen approved by the local board of health.
I suggest fleamarkets. Put ad in news paper. You may call your health department to get more info, good luck.
Well if it was me the first thing I would try is a little Ma/Pa shop grocery or gas station.
Then I would try a Mexican restaurant for the salsa, see if they would buy it off you for their customers and offer jars at the check out for people to purchase. Is that other a pastry sauce or PASTA sauce?