Need help interpreting these readings please

I've been testing constantly since my doctor told me my FBG was 104. I'm trying to figure out what food works for me and what doesn't.

So far, all of my 2 hour post food readings and random readings are normal. But my first reading in the morning before any food is still high.

Last night I ate 1 cup spaghetti, 2 soy meatballs, a large salad with broccoli and 2 Trader Joe cookies. 2 hours post meal was 120. I finished dinner by 6:30/7PM and worked out for an hour(Tae-Bo and some yoga). This morning my first reading before breakfast was 106(average of two readings-99 and 114). For breakfast I had quick oats with fresh blueberries, a protein shake and 3 saltine crackers and my 2 hour post draw was 81.

So it appears like my glucose level stays within normal limits and fairly stable all day except after dinner through first thing in the AM. What does this mean?

Edited to say I'm also low in iron, Vit D, and potassium for which I started taking supplements per my doctor. I have heard some of these issues(Vit D and iron) if deficient can cause high blood sugar issues. I wonder if after a month or so on supplements, I start seeing better first morning readings.

Try testing 1 hour after your first bite to see where your glucose is. Also, try minimal carbs before bed, but with some protein before bed to knock down the DP.