Grate enough of an orange to make 1 tablespoon grated orange peel
Make the salsa: Peel and segment all the oranges and cut into bite-sized pieces.
Combine the orange pieces, basil, onion, peppers, olive oil, vinegar and salt in a small bowl and set aside.
Prepare the fish: Put the orange juice, grated orange peel and white wine in a deep skillet. Bring the mixture to a boil and then reduce the heat to medium low.
Carefully lower the salmon fillets one at a time into the simmering liquid, bring the liquid back to a simmer, then cover the pan and remove it from the heat. Let it sit for 10 minutes, then check to see if the fish is done.
Use a slotted spoon to remove the salmon from the liquid.
Serve each salmon fillet with a generous helping of the salsa.