Last new year I made a resolution to try not to waste as much, food wise. Too much food gets wasted. I started (and still do) to “bulk cook”. When I make lasange, I will cook two huge trays and then use what I need for dinner, and the rest is divided up and placed into individual containers and frozen. I do the same thing when making a pot of mashed potatoes, I make a huge pot, then into containers and into the freezer. Next time I’m cooking dinner and need some mash with it, out of the freezer, into the microwave on high for 8 minutes and…... lovely fluffy mash. Cuts down on amount of energy you use, and works well since I work shifts and am sometimes too tired to make dinner from scratch.
Also works well with all sorts of things you would normally make. Make a bit more and freeze, your future (next day/week/etc) busy self will hug you for it :-)