This is very correct scientifically you know... I follow this routine always!
You know when you wake up! Your body just shifts to top gear... that means... it requires more fuel to burn ... If you go empty stomach... the fresh peptic juices that are prepared are acidic in nature and can start acting on the mucosal and stomach layers.... which over a long period of time can lead to ulcers and conditions like stomach erosion!
Having a great breakfast.. puts the body into maximum level of activity and every function starts responding more avidly. So ... breakfast like a king - VERIFIED
Now at Lunch time... you have your energy stock from the breakfast but there's more work to do,.. for you and your bodily systems... Moreover your stomach has had its fair share of workload and now needs a lesser amount to work upon.... moreover the stomach adjusts itself in the morning to keep stock of some food if it is not provided later on in the day... you know... self-care and protection! So you need a bit lesser food in the daytime
And in the night the best foods are salads cause they are the easiest to digest! The body prepare for the rest phase and all systems go slow!