What do you have for breakfast when you are on a diet?

I usually used to eat a quick and easy breakfast. But I heard that it's important to eat a proper breakfast when you're on a diet.

What do you usually eat for breakfast when you are on a diet?

I don't have much time in the morning, so I'm trying to eat something simple.

It’s not easy to make sure to eat this. Something that isn’t heavy on the head and is easy to digest.

If you have any menu recommendations, please suggest them.