Hi deniss,
Welcome to the forum! It's sound like your daughter may be having status seizures especially if she is out of it for 30 min. this type of seizure can be very dangerous. My advice to you is to get her to an Epilepsy Center to see an Epileptologist -Dr. specializing in epilepsy. You can usually find an Epilepsy Center at a University hospital.
Your daughter should have a SPECT scan, PET scan, and a CT scan. these tests will show what the eeg and MRI didn't show unless she has brain damage to deep for the tests to pick up. This happened with me when I had a e.e.g. done.
You mentioned that your daughter has seizures while eating breakfast. If she is eating to much starch food, carbohydrates, and sweets it can trigger seizures or it may just be a pattern of the time of day she has any seizures. My advice to you is to get a calendar and write down the time she has a seizure along with a discription of the seizure. Also have her write on the calendar when she starts and stops her monthly cycle because hormones changing can sometimes trigger seizures for some women.
If I may ask does your daughter get enough sleep? Sometimes people with sleep disorders can have seizures and if the blood sugar is to low it can cause seizures. One thing I've learned to stay away from is anything with nutra sweet in it it has been proven that nutra sweet causes more electrical activity in the brain which can cause seizures for many people.
Check out these websites for more info.
http://www.emedicine.com/neuro/index.shtml#seizures
www.epilepsy.com
Here's wishing you and your daughter only the best. May God Bless You!

Sue