There is a ton of waste especially on the short overnight transatlantic flights. Last time I flew I had dinner and the cheese and then fell asleep. Sometime later I woke up to use the lav and walked past a cart with 15 or ice cream cups on it. I asked the FA if I could have one and she offered to build one with whatever toppings I wanted and deliver it to my seat while I used the lav.
I’ll reiterate what I said earlier, I don’t care about selecting a specific meal ahead of time but if we can select whether we want a meal at all it would be great. That should help quite a but with waste.