Orange Cheesecake

Line souffle dish or 6-inch spring form pan with aluminum foil. Decoratively arrange orange sections in bottom of dish. Beat cream cheese until smooth. Beat in 1/2 cup sugar. Beat in eggs, one at a time. Pour mixture over orange sections. Sprinkle with crumbs. Cover dish securely with aluminum foil. Place cooking rack or steamer basket and 2 cups water in 6-quart pressure cooker. Place dish on rack or in basket. Close cover securely. Place pressure regulator on vent pipe. COOK 20 MINUTES, at 15 pounds pressure. Cool cooker at once. Remove cheesecake and cool in souffle dish on wire rack. Loosen edges and unmold. Refrigerate until chilled. Meanwhile, mix 1/4 cup sugar and cornstarch in small saucepan. Stir in 1/2 cup of reserved mandarin orange juice. Cook and stir until sauce boils and thickens. Stir in extract. Let cool and spoon sauce over cheesecake.