Have you considered making a FAI on a computer that includes a cereal port?

Simplified nutrition problems are usually given for examples of constrained optimization, and there's no reason in principle you can't use the techniques to decide what to have for breakfast. To this extent, once you've examined the evidence on various nutritional philosophies and perhaps self-experimented with your diet a bit, it's a matter of deciding on the end goals your breakfast is in support of, as Hurt said. Because the evidence on nutrition can be somewhat scrambled, performing these tasks with eggcellence is easier said than done.

Perhaps you're also asking the wrong question -- should you, in fact, have formal meals such as breakfast? There are some who advocate eating as hungry, and not at set times. Food for thought.