Saute scallions and garlic in butter until softened. Cut artichoke 2. Combine cream, eggs, salt and pepper in medium bowl. Sprinkle grated cheese over the bottom of the partially baked crust. Bake 35 minutes until golden and slightly puffy.
Process walnuts until coarsely ground.
Add flour and salt to work 2. Place pieces of butter atop dry ingredients and pulse until mixture 3. Add egg and process just until mixture begins to hold together. Remove dough from processor and shape into a flattened disc. Roll dough large enough to fit into 10 inch quiche or tart pan.