Heat cast iron skillet over medium heat. While skillet is heating, chop up kale, and thinly slice 1/2 red onion.
Melt 2 Tbsp butter in pan. Then add 1/2 whole red onion (sliced). Season with a sprinkle of salt and pepper. Sautee for 3-4 minutes, or until onion is slightly translucent.
After onion is slightly translucent and softened, add 1 tsp minced garlic, 1 tsp lemon juice, and about 4 cups of chopped kale. Cook for another 3-5 minutes, stirring kale occasionally. Remove from heat once kale is softened, and a bright green color.
Top with freshly grated parmesan cheese, salt and pepper, and enjoy.
Serve with a pan fried pork chop, tofu, scrambled eggs, or salami + your favorite grain for a full meal.