Start by rinsing and removing the coarsest ribs from the kale.
Bring a pot of lightly salted water to a boil and add the kale. Let the kale cook for 10 minutes.
Take the kale out of the cooking water and place it in a sieve. Simply discard the cooking water from the kale.
Press the kale down in the sieve to drain the water.
Chop the kale finely on a cutting board.
Melt the butter/duck fat in a pot and add the flour while whisking, forming a roux.
Then add your fond/bouillon/cooking water from the ham and stir it until you get a smooth mixture.
While whisking, add the milk.
Bring it to a boil and add the kale. Let it heat through for 5 minutes.
Season your kale stew with freshly ground salt and pepper, as well as sugar.
Keep the display on
Notes
If you're using frozen kale, just put it in the roux-based sauce while it’s still frozen. Let the frozen kale thaw in the sauce under a lid, stirring occasionally.