One of my favorite ways to save on groceries is to buy them fresh from the farm. Right now I'm paying $1 dozen for eggs. And not just any eggs, but farm-raised eggs that are probably higher-quality and fresher than the most expensive organic eggs at the grocery store. Farm-fresh milk from a small local dairy is $2 a gallon. Many gardeners would be happy to share extra produce for a few dollars.
I would encourage you to search out options for locally-grown groceries--check your farmer's market, keep your ears and eyes open, ask friends. You may end up finding some high-quality foods at amazing prices.