If there are more burritos in the future, then: I eagerly await Episode 2: One More Burrito [from last week's funky leftovers]
The cost of the singular burrito has now been reduced to ~$30, which still seems rather expensive.
I have no idea where you're coming from with the "dealing with food waste" part so I'll just ignore it.
The strategy is dependent on what is more precious to you - time, or money. Telling someone they should spend their time to save $10 is pretty pointless if you don't know what their financial situation is and whether that $10 has any meaning.
Food waste is food that you buy which is not ultimately consumed , which increases your cost per meal. This might be trimmings, it might be something you burn, it might be leftovers you don't get to.