Preheat oven to 375 degrees F. Spray appropriately sized baking dish with cooking spray and lay salmon fillet in dish, skin side down.In a small mixing bowl, whisk together orange juice, maple syrup, mustard, and garlic. Pour sauce over fish and cover with foil.Bake for 15 minutes. Uncover, and bake another 5 minutes until top of fish is caramelized and fish is cooked through.