Preheat outdoor grill to MEDIUM-HIGH. In a small bowl, combine first 5
ingredients (mayonnaise through dill); set aside.
Coat e grill grate with a little olive oil. Grill fillets for 3 to 4 minutes per side or until fish flakes easily when tested with a fork.
Arrange mixed salad greens and baby spinach on dinner plates; top each with a fish fillet, then some dill sauce. Enjoy!