Creating your Garlic Butter Steak and Potato Foil Packets is simple if you follow these easy steps:

1. Preheat the Grill/Oven: Preheat your grill to medium-high heat or your oven to 400°F (200°C).
2. Prepare the Foil: Cut large pieces of heavy-duty aluminum foil, approximately 12 inches long, and lay them flat.
3. Make the Garlic Butter Mixture: In a small bowl, combine the melted butter, minced garlic, chopped rosemary, salt, and black pepper.
4. Assemble the Packets: Divide the halved baby potatoes among the foil pieces. Drizzle half of the garlic butter mixture over the potatoes.
5. Add Steak: Evenly distribute the cubed flank steak over the potatoes and drizzle with the remaining garlic butter mixture.
6. Include Optional Ingredients: If using, add cherry tomatoes and green beans to each packet for additional flavor and nutrition.
7. Seal the Packets: Fold over the foil to create sealed packets. Make sure they are tightly sealed to prevent leakage.
8. Cook the Packets: Place the foil packets on the grill or in the preheated oven. Cook for 25 minutes, flipping the packets halfway through.
9. Check Doneness: After 25 minutes, carefully open one packet to ensure the steak is cooked through and the potatoes are tender.
10. Serve: Carefully unwrap the packets, being cautious of steam. Plate and enjoy!

These steps guarantee a remarkable meal right at your fingertips.