You have to be open to the idea (and the potential reality) that you could be wrong. In the tech space there are tons of examples of companies that started out to do X and ended-up doing something radically different. I know it's what you want and your family recipe, etc. That in no way constitutes a formula for success, it's just what you want. Success could very well be somewhere entirely different or a few minor changes away.

Another thought. Find your local SBDC chapter (Small Business Development Center) and SCORE (?? of Retired Executives). You might be able to connect with someone with deep knowledge of the food business who could help you figure it out. There might also be loans or grants that, along with advise, could help you get past this problem.