Begin by heating your grill or oven to 400°F.
In a mixing bowl, combine the shrimp, halved baby potatoes, corn pieces, melted butter, chopped garlic, seafood seasoning, smoked paprika, sea salt, and black pepper. Mix thoroughly until all ingredients are well combined.
Cut four sheets of aluminum foil, each about 12 inches long.
Evenly distribute the shrimp and vegetable mixture onto the center of each foil sheet. Lay lemon slices on top of each portion.
Fold the foil over the mixture, sealing the edges tightly to create individual packets.
Place the packets on the grill or in the oven and cook for 15-20 minutes, or until the shrimp turn pink and the potatoes are fork-tender.
Carefully unwrap the foil packets, being cautious of the hot steam, and sprinkle with fresh cilantro before serving.