Stir thoroughly the first three ingredients and 1/2 tsp. salt. Combine egg, milk and oil; add all at once to dry ingredients. Stir just till well mixed. Combine dates, orange peel and juice; stir into batter just till blended. Spread evenly in greased 9 inch square pan. Mix remaining ingredients; sprinkle over batter. Bake at 375 degrees for 25 to 30 minutes.