Melt the vegan butter in a skillet over medium heat. Add the onion & garlic and cook down for 3 minutes, stirring frequently so it doesn't burn.
Add the cauliflower rice, and a healthy pinch of salt & pepper. Cook for 2 more minutes, stirring frequently so it doesn't burn.
Add the kale & lemon juice and toss until the kale is wilted. Taste and adjust the seasonings as needed. Serve as a side dish or as a rice replacement.
Video
Notes
If you use frozen cauliflower rice, add it to a fine mesh strainer and rinse it with water until thawed. Drain and press out as much water as possible. You don't want there to be too much liquid in the pan. You can also find riced cauliflower in the fresh section. You can also rice your own cauliflower by grating a whole head.
I like my cauliflower rice to have a slight bite to it. If you prefer a more cooked texture, increase the cook time once you add the cauliflower to the skillet.
If the pan seems too dry you can add 1 or 2 tablespoons of broth.