For the Chamoy sauce place all ingredients in a blender, cover and blend on medium speed until smooth.
For the Charred Corn Relish grill corn over medium heat, turning occasionally for 10-12 minutes, or until tender and lightly charred. Cut corn kernels from cobs and toss with tomatoes, green pepper, onion, blood orange juice and ½ of the Chamoy Sauce in large bowl. Refrigerate until ready to serve.
Pre heat the oven to 180°C, 350°F, Gas Mark 4. Place the salmon in a baking dish, brushing the top of each fillet with 1tbs of the remaining Chamoy sauce. Bake in the oven for 12-15 minutes, until the fish flakes easy with a fork. Flake each fillet into large pieces.
To assemble the tostadas place 4 avacado slices in each shell, top with around 50ml of the Charred Corn Relish, 2 Tbsp sour cream and ½ a flaked salmon fillet. Drizzle with the remaining Chamoy sauce to serve.
*Cooks tip: If tostada shells are unavailable use taco shells.
If tostada shells are unavailable use taco shells.