1. Place baby potatoes in a medium saucepan with enough water to cover. Bring to a boil, then simmer until potatoes can be pierced with a knife but are not completely tender, about 8–10 minutes. Drain well and set aside in a medium bowl.2. Once the potatoes are cooled, using the same bowl, coat with olive oil and season with garlic powder, salt, and pepper. Stir to mix. Repeat the process with the onion and Brussels sprouts in their own separate medium bowls.3. Using a zip-top plastic bag, combine the beef sirloin with olive oil and season with garlic powder, salt, and pepper. Seal the plastic bag and shake to mix.4. Preheat grill or a grill pan to medium heat.5. Using metal skewers, thread the meat, potato, sprouts, and onion in an alternating pattern. Do not push too tightly together.6. Place skewers on the grill, turning once halfway through and cook until desired doneness, approximately 8–10 minutes.7. Serve with your favorite evening cocktail, like an Irish Mule, and enjoy!
Note: To spice things up, consider adding different spices like cayenne pepper, red pepper flakes, or a Cajun seasoning. For something more subtle, consider using an herb blend like Italian seasoning.