In a small saucepan, heat the apple cider vinegar over medium heat. Turn on the heat and start the timer for 4 minutes. Remove from heat when done.
In the meantime, put the water in a microwave safe measuring cup and heat in the microwave for 1 minute. When done, stir in the semolina flour and leave in the closed microwave for now.
Start browning 6 tbsp of butter in a medium saucepan over medium heat. Once the butter begins sputtering keep a very close eye on it! This means the browning is beginning.
Meanwhile, in a large frying pan, heat the remaining 2 tbsp butter over medium heat. Once melted, add the kale gnocci and cook for 5 minutes, stirring occasionally.
When the butter is browned, remove from heat and mix in the garlic and walnuts. Let rest for 1 minute.
Stir in the reduced apple cider vinegar, then the starch water, and finally, the cheese.
Serve by plating the gnocchi, then ladle the broth, getting plenty of walnuts in each scoop, over the kale. Garnish with additional Parmesan cheese as desired. Eat immediately.