Place fillets flesh side down in lemon juice for 5 minutes. Flip fillet and sprinkle flesh side with lemon zest, salt, pepper and thyme.

Spray grill pan with olive oil mister or PAM and grill flesh side down on medium for five minutes, flip fillet and fry for an additional five minutes until the fillet is no longer pink on the inside.

Serve with roasted potatoes or rice with vegetables.