Heat the oven to 400°.
Take the salmon out of the freezer and cut it into 1/3-inch dice. Sorry, but the food processor won’t work for this; you’ll just make mush.
Put the salmon in a medium bowl with the scallions, bell pepper, alapeño, sour cream, and Tabasco. Season well with salt and white pepper and fold together with a rubber spatula. Add the beaten egg white and fold it in gently but thoroughly. The burger mixture will be pretty loose.
Heat the vegetable oil in a large ovenproof nonstick skillet over medium high heat while your form the fish into 4 burgers. The easiest way to do this is on a plate; divide the mix into quarters and shape into burgers with the rubber spatula or moistened hands.
Slide the burgers into the skillet. Reshape them with the spatula if you need to, and cook for 1 minute, to set the bottoms.
Slip the skillet into the oven and bake for 2 to 3 minutes, until the tops are opaque and milky. Let the burgers rest in the skillet for 5 minutes.
Meanwhile, split the pitas and brush the insides with olive oil. Grill the pitas until hot and toasted.
Peel, pit and chop the avocados. Coarsely mash with the lime juice and a big pinch of salt.
To serve, put each burger on a pita half, divide the avocado among the burgers, and top with the remaining pita halves.
Published on August 24, 2011