Wash, dry, and roughly chop the kale, including the stems. (The stems have all the potassium, so do include them!)
Toast the bread until crisp but not burnt, then finely chop or pulse in a food processor to make breadcrumbs. Add the Italian seasoning and stir to combine.
Heat 1 tbsp of the oil or fat over medium heat in a non-stick pan or cast-iron pan, swirling to coat.
When the oil is shimmering, add the breadcrumbs and sauté until crispy. Pour out onto a plate. Do not wipe out the pan.
Add the remaining 1 tbsp of oil or fat and wait a minute until it's hot. Add the kale, and sauté for 8-10 minutes until wilted, and crispy in spots.