Baked Haddock

Ingredients

• Cooking spray
• 2 pounds haddock fillets
• 1/2 teaspoon onion powder
• 1/2 teaspoon paprika
• 1/2 teaspoon garlic powder
• 1/2 teaspoon ground black pepper
• 1/2 teaspoon salt
• 1/2 onion, sliced
• 1 4 Tablespoons butter, cut into 8 thin slices
• 2 lemons, sliced