Peel and quarter the potatoes; transfer to a medium saucepan.
Cover the potatoes with hot water (from the tap); bring to a boil over high heat.
Cut out and discard the center stems from the kale leaves; slice the leaves crosswise into ⅛-inch strips and transfer to a large bowl.
Preheat a skillet over medium-high heat.
While the skillet heats up, pat dry the steak with paper towels and place on a plate. Season the steak generously with salt and pepper on both sides.
1 ½ lb striploin (New York strip) steak
1 tsp salt
½ tsp black pepper
Once the water in the saucepan is boiling, reduce the heat to medium and cook until the potatoes are tender when pierced with a knife, 15 to 20 minutes. Once done, drain the potatoes and return to the saucepan; cover to keep warm.
Once the skillet is hot, add coconut oil and swirl to coat the bottom.
1 tbsp virgin coconut oil
Carefully place the steak in the skillet; flipping every 15 to 30 seconds, cook the steak until desired doneness (5 to 7 minutes for medium-rare). (Use a thermometer or cut into the steak to check the doneness.) Once done, transfer the steak to a plate and let it rest for 5 to 10 minutes.
While the steak cooks, trim off and discard the root ends of the garlic; peel and mince or press the garlic.
4 cloves garlic
Once the steak has been transferred, reduce the heat to medium. Add the garlic and kale; season with salt and pepper. Cook, stirring frequently, until the kale is wilted, 3 to 4 minutes.
½ tsp salt
¼ tsp black pepper
Add butter, broth, salt, and pepper to the potatoes; mash with a potato masher until smooth.
4 tbsp butter, unsalted
8 fl oz (1 cup) chicken or vegetable broth
½ tsp salt
¼ tsp black pepper
Add the kale to the saucepan and mash with the potatoes.
To serve, divide the colcannon and steak between plates. Enjoy!