Husband is not doing keto, but we have cut our carbs to a minimum. We still eat them, just not many.
This has become one of his favorite meals.
One bag of fresh brussel sprouts, or thawed frozen ones, sliced VERY thin
One can (yeah, it can be nasty, but...) corned beef (I usually use half the can for one serving)
Heat skillet, add some olive oil and toss in the brussels, add salt and pepper and a small amount of garlic powder/salt. Stir and cook until brussels begin to slightly brown, then add the corned beef and stir well, breaking up the corned beef. Turn down the heat and let the corned beef warm through.