• 1/4 cup plain fat-free yogurt
  
• 2 tablespoons grated Parmesan cheese
  
• 2 tablespoons fresh lemon juice
  
• 2 tablespoons low-fat buttermilk
  
• 1 tablespoon Dijon mustard
  
• 2 teaspoons Worcestershire sauce
  
• 2 teaspoons anchovy paste
  
• 1/4 teaspoon black pepper
  
• 6 garlic cloves - crushed
  
• 4 (6-ounce) mahimahi or other firm white fish fillets
  
• Cooking spray
  

Prepare grill or broiler.

Remove fish from bag, reserving marinade. Place fish on a grill rack or broiler pan coated with cooking spray, and cook for 3 minutes on each side or until fish flakes easily when tested with a fork, basting frequently with reserved marinade.