sweet potato custard breakfast muffins with greens, and chevre

Still attempting to shake up the breakfast menu. This morning we had a winner, for sure.
Ingredients:
1 large sweet potato
1/2 red onion, chopped small
A large cereal bowlful of greens, chopped fine
Fat for sauteeing (such as butter or bacon grease)
8 eggs
1/4 cup cream
1/4 cup milk
Chevre - a goodly amount
Sea salt - a 1/2 tsp each for greens and custard mixture
Freshly ground pepper

Butter to grease the muffin cups

I sauteed the onion and the pile of greens - dandelion and kale
mainly - while I baked a large sweet potato. I cracked 8 eggs into a
mixing bowl with 1/4 cup cream and 1/4 cup milk, then added the peeled
sweet potato, sea salt and ground pepper, and took the immersion
blender to it to mix it till frothy (a blender would work fine).
Filled buttered muffin cups with a layer of the sauteed greens, then
topped off with the custard mixture up to maybe 1/4 inch from the top.
Then! I plopped generous spoonfuls of chevre into the center of each.
Baked at 350 until golden and firm. They came out all puffed up and
beautiful, but quickly fell as any other puffed egg thing does. Still
delicious!! I have an earthenware muffin cup dish with extra-large
cups. I'd say it would've been 8 regular-sized muffins.
But then there was a lot of the custard left over. So I poured it into
buttered (cast iron) mini-muffin cups that baked up to look and taste
just like popovers! With a really nice sweetness and color from the
sweet potato. A pat of butter that inevitably slid down the piping hot
muffin onto my fingers just meant that they were literally finger-
lickin' good.
And both were a hit with the adults as well as the wee one of the
house, so they score extra stars.
In the future I might either use fewer eggs to make fewer muffins,
or saute' more greens to fill all the muffins. But as it was, I
enjoyed having some more meal-like muffins and some treat-like ones.
Experiment amongst yourselves and get back with me.