Switch to Malt-o-Meal. Tootie Frooties keep me goin'.
You can get beans in massive quantity for cheap from Sam's Club. Same for fruit - Bananas are 33c/lb
Try looking at turkey, occasionally (especially after thanksgiving) it can be had for 20c/lb. Also, where do you get your chicken? I pay about .69/lb for chicken at Sam's.
Tuna can also be had in massive quantities for cheap if you have a way to store it. Just don't eat more than 16oz a week, due to mercury content...
I eat for about $20/week. It's not glamorous, but it's good enough for me!
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Weather today: Hot. Humid. Potholes.