Oh! Since Jeff's question was just about food deserts in general, I googled to see if SNAP dollars can pay for meal kits and got this answer:
"Because home meal kits from the likes of Blue Apron, Hello Fresh, Home Chef, and Top Box send subscribers partially-prepared food ingredients to be prepared at home they are EBT eligible. However, a company needs to be approved by the USDA to accept payments with SNAP benefits."
There are other options too. People can band together and form a food co-op, they can start little bodegas or produce carts, they can get transportation assistance from agencies to go buy food, they can get free seeds to grow their own food, etc. But the best solution would be for grocery stores to make sure their stores are reachable by all neighborhoods of a city.