Here’s a line of thinking I found that was useful. You might find it useful too.
1. Food security starts with successfully growing something you can actually eat. It progresses as you get more skilled at growing a variety of foods throughout the season.
2. If you can get to the point of either personally growing or locally sourcing nearly everything your family eats, you are well on your way to food security.
3. However, real food security that can handle a wider variety of threats and opportunities goes beyond simply growing lots of food locally. It requires growing or raising heirloom and heritage foods locally that few others in the world do.