Preheat a grill for cooking over medium-high heat.
Add the shrimp, garlic, butter, Cajun Select Seasoning, juice of 1/2 lemon and some salt and pepper to a bowl and toss all together. Skewer the shrimp on metal skewers. Grill the shrimp, drizzling with hot sauce if desired, until plump and pink, about 2 minutes per side.
Grill the remaining 1/2 lemon until charred, 3 to 4 minutes. Serve with the shrimp.
Cajun Select Seasoning:
Blend together the salt, granulated garlic, paprika, cayenne, onion powder, black pepper, sugar, basil, celery seed and oregano in a bowl until combined. Store in an airtight jar for up to 6 months.