Preheat oven to 425 °F (218 °C) and prepare a rimmed baking sheet by spraying lightly with cooking spray. Set aside.
Gently pat dry both sides of the haddock then season with salt. Place on the baking sheet.
In a bowl, mix together all the ingredients for the topping then using your hands, gently and evenly spread it across all the haddock. It doesn't have to be perfect.
Bake for 7 minutes or until the haddock is cooked through and the topping is slightly brown.