Adding a fish taco sauce to your blackened salmon tacos is a great way to boost flavors. My favorite is the avocado salsa shown here, but you could make an easy avocado crema by blending avocado with a little sour cream and lime juice, then seasoning with salt and pepper. Or I have a great white taco sauce included in my Baja fish tacos recipe that would also go well with these salmon tacos.