I cook every single meal we eat and meal prep and have zero leftovers. We have a chest freezer full with meat/veggies, etc and a chest freezer full with ready made individual meals, currently 23 different ones. All we have to do is open the freezer and grab what we feel like eating that day. We never wonder what we are going to eat that day, we have plenty of choices. We also don't have to both eat the same meal if we don't feel like. I try to always have 100+ ready meals in the freezer which is two meals a day for 50 days for the two of us. I don't have time to cook during the week and this makes it very easy as well. Way cheaper than buying ready made meals that you still have to cook and I am sure it is a lot healthier as well.
Since we started doing that, our grocery bills went way down and as mentioned, there are no leftovers at all that get wasted.