1-Parboil the corn and potatoes: Parboil petite potatoes for 12 to 15 minutes until just tender, adding corn rounds for the last 5 minutes; drain and cool before threading.

2-Assemble the skewers: Soak wooden skewers for at least 30 minutes or use metal. Thread 1 to 2-inch cubes of seafood and vegetables, leaving small gaps for heat circulation. Brush lightly with oil and season.

3-Make the crab boil garlic butter: Melt 1 stick unsalted butter with 2 tablespoons crab boil seasoning and 4 minced garlic cloves. Simmer 2 to 3 minutes; add a squeeze of lemon if desired. Use for basting and dipping.

4-Grill the skewers: Preheat grill to medium-high (400-450°F). Grill skewers 8 to 10 minutes total, turning once or twice and basting with garlic butter. Shrimp cooks 2-3 minutes per side; firmer fish 4-5 minutes. Seafood is done when shrimp are pink and opaque, scallops firm, and fish flakes easily.