Preheat the oven to 375 degrees F.
Set a large piece of foil on a small cooking tray or cookie sheet. Be sure the foil is big enough to make a "tent" or packet around both pieces of salmon.
Lay each piece of salmon on the foil, skin side down and sprinkle granulated garlic, pepper, salt, and tarragon on top of the salmon.
Make a tent with the foil over the salmon and seal the edges of the foil tightly.
Bake in a preheated oven (at 375 degrees F.) for about 15 minutes or until it’s fully cooked (depending on the serving size, it could take less or more time to cook through).
Serve this salmon while its slightly warm on top of the avocado salad.