Lightly grease bottom and ½ inch up the sides of a 13 x 9 inch baking pan. Set aside. In large bowl, mix flour, baking powder, baking soda and salt. Set aside.
In large mixing bowl, beat butter with mixer on medium speed for 30 seconds. Add sugar; beat til mixed. Add eggs, one at a time, beating well after each addition. Beat in ricotta cheese. Beat in as much of the flour mixture as you can. Using a wooden spoon, stir in any remaining flour mixture. Spread batter in prepared pan. In another bowl, mix nuts, brown sugar, wheat germ, cinnamon and nutmeg. Sprinkle evenly over batter. Cover and chill for up to 24 hours.
Preheat oven to 350. Uncover pan and bake for 35 to 40 minutes or til wooden pick inserted near center comes out clean. Cool slightly; Serve warm. Makes 15 servings.