Preheat the grill over medium high heat (approximately 450 degrees F).
Cut 4 large pieces of heavy duty foil into approximately 12X12 inches and spray the foil into non-stick cooking spray.
Evenly portion out the steak, shrimp, corn, tomatoes, red onions and lemon wedges onto each of the pieces of foil.
Season each of the ingredients in the packets with the minced garlic, old bay seasoning, thyme, cumin and black pepper. Drizzle the melted butter on top of each packet.
Then fold up the edges of the foil around the food to create a closed packet.
Place the foil packets on the grill over direct heat. Grill for 15-20 minutes (flipping halfway through the cook time) until cooked through and the steak has an internal temperature of 130 degrees Fahrenheit.
Serve immediately topped with fresh parsley and enjoy!
Notes
You can also bake these packets for 15-20 minutes at 425 degrees F. Refrigerate the leftovers in an airtight container for up to 3 days.