Rinse filets & pat dry. Sprinkle cut sides with garlic & pepper, pressing them gently onto filets.
In a small saucepan, melt the butter over medium heat & add 1 Tablespoon Worcestershire sauce and Cajun seasoning, garlic, onion, green pepper, parsley.
Stir and sauté until onion translucent and sauce darkened and slightly thickened. Do not burn garlic – it will become bitter & spoil baste.
Add the bottle of beer, a 2nd tablespoon of Worcestershire sauce & simmer 15 minutes on medium-high heat.
Lay filets onto oiled grill grates or place on oiled aluminum foil over grill grates. Cook 20 minutes over low-medium heat, raising lid only to baste generously. Done when thickest area of fillet flakes easily. Enjoy!