Bake pine nuts in a shallow pan at 350°, stirring occasionally, 5 minutes or until toasted.
Combine pine nuts and next 9 ingredients; press half of mixture into a lightly greased 9- x 5-inch loafpan. Sprinkle with cheese, and press remaining lamb mixture over cheese.
Bake at 375° for 1 1/2 hours; remove from pan, and place on a rack in a broiler pan. Pour tomato sauce over top; bake 10 more minutes or until done. Garnish, if desired. Serve with toasted pita bread.
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