Preheat oven to 325 degrees.
1.Combine the hot water and oatmeal, let stand for 15 minutes, stirring occasionally.
2.In a large bowl, beat the eggs, butter, brown and white sugars until creamy.
3. Add the oatmeal, flour, salt, baking soda, orange zest and chopped pecans. Beat until just incorporated.
4. Pour the batter into a greased 13x9 inch baking pan. Bake 45 minutes or until toothpick inserted comes out clean. Remove from the oven and sprinkle the topping over the cake. Broil for 2 minutes, watching carefully so it doesn't burn.