I drink a small protein shake prior to my workout to give me the protein and energy needed. I also add an exercise supplement to the shake, to assist with muscle recovery. I notice without the supplement I tend to be more sore and recovery takes longer.
I then wait 20 or 30 minutes before I actually start the work out.
If I work out in the afternoon, I can sometimes forgo the supplement and protein shake, but in the morning I absolutely need the supplement because it has a little caffeine to kick up my energy level. Without that, my morning workout never gets out of first gear.
But then sometime after my workout and shower are complete, I will have my “real” breakfast.
Normally I do other chores (cleaning and tidying up, vacuuming…) before stretching. That's because in a way or another I allow my muscles to move around a bit and warm up.
Only then do I start with actual warm up exercises and finally stretch.