My kid eats whatever she has a hankering for, for breakfast. I just don't think there are breakfast, lunch and dinner foods. For those are the times of day you eat.
So she has been known to have, ramen, pierogis, tortellini, mac and cheese, potstickers, pizza, oatmeal, eggs, waffles, pancakes, french toast, bacon, bagel and cream cheese, cereal, cottage cheese and fruit, yogurt, fried rice, corned beef hash, beans and franks, meatballs, soup and leftover last nights dinner for breakfast.
Many of the above go in a thermos for later in the day.
If it is a really early meet she tends to eat lighter.
And for snacks I try to get in her a quicker carb and a protein keep her energy up. So egg whites with hummus, pasta and a protein. bagel and cream cheese, peanut butter and something. Grapes and cheese sticks, nuts, chicken leg (very portable), sliced deli meat.