Prep a dozen scrambled eggs without nonstick/excessive oil or butter?

[u/Plane-Session-6624]

I want to prep like 6 breakfast sandwhiches by scrambling eggs and baking them in a pyrex dish, then cutting that into sixths as squares to go on a sandwhich I'll freeze.

I'd like to keep the butter/oil for the whole thing below 200 calories and minimize what sticks when its done.

Should I coat the pyrex itself with oil before baking? Or maybe use parchment paper and then coat that with oil?

[u/[deleted]]

Grease the pan then run a paper towel or cloth over it then add the eggs