It is the correct amount of lasagna for $6. It tastes as good as most restaurant lasagna, a symbol of bourgeois decadence. It is ready in 70 minutes without preparation required.
Under communism we will solve the Lasagna Problem and provide quality lasagna to all workers for $6.
That makes a bourgeois amount of lasagna. A proletarian amount is 1200 calories. By seizing the means of production we can make lasagna at an economically viable scale. There will be no more paying $20 for the ingredients to make too much lasagna, only $6 for the amount according to your needs.
Could probably eat the entire eggplant version and still fall short calorie wise, the one where you replace the noodles with eggplant ones that is. Sometimes you just need to feed many comrades many times, but you bring up a good point about food waste going into the future for when that's not a concern.