| Do you actually get your blood glucose down to an acceptable level before going to bed? If you go to bed with it high, then yes, it is likely you are going to wake up with it high, regardless of whether you have dawn phenomenon. If you get your BG down after meals, including at bedtime, you will have a greater chance of getting your fasting BG to an acceptable level. Metformin may be doing all it can for you at the dosage you take. If your levels are never down to normal, how about additional meds or bolused insulin?
Are you thinking that if you get your fasting BG down, then your post meal BGs will all be better? Because then you would not be stacking more glucose into a system already brimming with glucose? I think you should work on both fasting and post prandial.
I thought Jacobsam was talking about a general diet, because I don't think anyone would recommend those carby foods to help dampen dawn phenomenon. | 
