Breakfast should be a big meal of the day it is the first meal after the night of fasting!
Breakfast, as the word says you are breaking fast. For most people, it is not a very important meal but it should be an important one. It is not difficult to have a good breakfast in 5 to 10 minutes. You can make and take it on the go.
To start with a serving of fresh fruits, fresh fruits have great nutritive properties. Smoothies, add raw vegetables and nuts depending. Then adding grains but not processed.