PS. I read a number of old cookbooks and such. It's kind of funny that working people used to eat the major meal of the day at noon-time---because they needed that energy from that meal to continue working the rest of the day. So they ate roasts, veg, etc. In the evening, their meal was lighter--leftovers or soup.
Light lunches of salads etc. were often served to ladies---particularly the non-working ladies of leisure because they didn't need to work in the fields or scrub floors etc and therefore, didn't need to eat huge roasts and veg.
I think, energy-use-wise, it makes more sense to eat a hearty breakfast and a hearty lunch. The breakfast will keep you going throughout the morning. The lunch will keep you going throughout the afternoon. And supper is kept light---because you are sleeping throughout the night and don't need the same amount of energy as you would when you are awake during the day. Just my 2 net carbs..........