How would I write an article on the topic "breakfast is the most important meal of the day"?

There are several things you would do in order to write an article about why breakfast is the most important meal of the day. The first step would be to conduct research that supports this position. There are several studies or articles you could use to support this position. One such article appears here.
Once you have done your research, you will need to organize your article. Your article should have a catchy title that will draw attention to what you are writing. You should also state your opinion in the opening paragraph of the article. From there, you would present multiple examples and evidence that support your contention that breakfast is the most important meal of the day. At the end of the article, you should summarize your main points. It also may be necessary for you to cite your sources so people who read the article can see where you got your information and also be able to look at those sources if they feel more information is needed.
https://www.webmd.com/food-recipes/breakfast-lose-weight