Hi, it sounds like you need to increase your fast acting insulin for your breakfast. If you are currently on a 1:1 ration of insulin, ie 1 unit of quick acting to 10g of carbs, you may need to increase this to 1.5:1 so that you put 1.5 times quick acting in to every 10g of carb you eat.
Try it and i reckon it will work. Everyone has different insulin requirements which believe it or not can change as the day progresses. I need less insulin in the morning but twice as much by the evening meal.
You should be able to tinker with your own doses quite safely, just be sensible. Don't increase too much too quickly and keep checking your BG before every meal and write them down. You will soon spot a pattern forming and this will tell you your insulin ratio's that YOU require depending on the time of the day.
No doctor or nurse can tell you this onformation, you have to record it yourself and try adjusting your doses.