Yes exactly.
So I have just the normal seeds from my allotment (as long as non f1/ not sterile).
And put them in a tray with a tiny bit of soil as if you are starting them normally. You would sow them tighter than usual. Then in 7 days when they sprout you just trim off and there’s your greens.
You can eat pretty much most things it’s wild. Because you are eating the seed leaves (the soft cotyledons) and not the true leaves - pretty much all are edible but do check online first.
So I have just started and am using up what I have lots of first…
Broccoli
Beetroot
Peas
Kohl rabi
Rocket
bunch of random lettuce which will sow in a deeper tray to get some leaf style
radish
kale
basil
pakchoi
then once I have gone through these and start restocking then I might start adding popular microgreens ones to the collection too like cress, mustard, mizuna, but keep quantities of these small because I really want the functional multipurpose seeds that I can use for food, greens or seed.
I am using the takeout tray method so they are self watering and you can have some spare lids for mini propgators.
Just starting so unsure about the rotation aspect yet. I assume you just replant once you finish cutting a tray.
I will keep you updated of my progress!