I know this is a few weeks old, and don't know if you are looking for low carb, but here's my almost every day breakfast:
1/2 c dry measure old fashioned oats
1/4 c wheat bran
dash of salt
Cook in microwave w/ 3/4 c water for a few minutes.
Add 2 eggs and stir very well.
Cook 30 seconds and stir, cook another 30 seconds if needed to desired consistency-I like it when the eggs are cooked through, but not stiff.
I also add cinnamon and natural peanut butter.
Depending on how much PB you add, it would be less than 400 cals.