https://www.foodnetwork.com/recipes/jamie-oliver/salted-preserved-lemons-recipe-1955868
I just slice the lemon into 4 wedges (I don’t bother trying to keep it together) which I find packs into a jar more easily. Then I add enough salt to completely cover/surround the lemons, especially on top. This recipe is great with meyer lemons.
They look great! You’re right, they’re perfect when they get to that stage. Takes a bit of time, but worth it.