You would just take your basal insulin (Lantus if you take it in the morning, or Levemir) as usual and this should keep BG steady if you have the right dose.
The fasting in the morning test doesn't work for me. If I fast then my glucose rises. I
I have no problems missing or delaying lunch or dinner but my levels will start rising from the time I get up and the longer I delay breakfast , the more my glucose levels rise.This works well if I'm going to have a fasting blood test ,my breakfast will be delayed my a couple of hours and my glucose will only rise a couple of mmol/l.
At it's worst if I miss it entirely it can cause very high levels. I reached one of my highest post diagnosis levels when we left early on a car journey and I didn't get breakfast until about 10.30am, (probably extra stress hormones thrown in :it rose to 16+ mmol/l)
With a pump, I could set a higher basal rate until I ate breakfast but the time this adjustment was made would vary from day to day depending on when I actually got up. I would then have to adjusts my rates later in the day. This sort of daily alteration would be a faff on a pump and impossible on MDI. It's easier to eat some breakfast.