Preheat oven to 450°F

Heat oil in a skillet over medium heat. Add peppers and onion, cook until tender about 10 min

Add mushrooms, wine, and thyme and cook for 3 min

Place fillets in a greased baking dish, folding under narrow ends. Sprinkle with lemon juice, salt and pepper

Spoon vegetable mixture over fish. Bake 15 to 18 min until fish is opaque throughout