Six days out of seven I eat traditional porridge oats (40g serving) for my breakfast together with semi-skimmed milk/water, yogurt, blueberries, pumpkin seeds and linseed's, all together it works out at just over 40g of carbs, on a weekend I'll have boiled eggs with toast or scrambled eggs on toast.
What ever you do don't buy the instant porridge oats as they are highly processed and high on the glycemic index, oats are fantastic at lowering cholesterol and very filling, I never feel hungry after eating them and don't feel the need to snack before lunch.
As always it's best that you test your bg postprandial to see what effect any breakfast has on your diabetes control, what suits one person may not suit another but you should make sure it's as nutritious and filling as possible.