The morning is a good idea but I also would prefer to do it in the evening. Because 1) indeed SI is lower and 2) I would like to see death as an eternal sleep (without dream) and so I find it more natural to do it in the evening.
Indeed. That's a pity.
Yes, indeed a slower onset. The point would be to not eat Mac Donalds before and that the stomach is not almost exploding.
Butter would be fine I guess. I might go for a toasted warm sandwich cheese and ham and a little mix of fruits, like maybe an homemade compote of apple, cinnamon with a yogurt and maybe on the top some almonds cuts in little pieces.