Salmon Burgers with Green Tartare Sauce

Name: Salmon Burgers with Green Tartare Sauce
Ingredients: 1 1/2 pounds skinless salmon fillet, finely chopped by hand; 1 cup finely diced red and green bell peppers; 1/4 cup finely chopped scallions; 1/4 cup heavy cream; 2 teaspoons Tabasco sauce; 2 teaspoons kosher salt; Freshly ground black pepper; 1 large egg white; 1 1/2 tablespoons vegetable oil; 1 tablespoon unsalted butter, cut into 6 pieces; 6 grilled or toasted nan breads, cut in half; Green Tartare Sauce; 6 thick slices cut from a large ripe tomato; 1 1/2 cups lightly packed tender salad greens