Preheat oven to 350°. Mix matzo meal, potato starch, and salt in a large bowl. Add carrot and next 8 ingredients; mix well. Stir in melted margarine. Pour mixture into a greased ring mold or 9-inch baking dish, and bake at 350° for 1 hour or until wooden pick inserted in center comes out clean. Let cool on a wire rack about 10 minutes. Turn out onto a plate. Serve at room temperature.