Pour boiling water over quick oats, let stand 20 minutes. Mix together with flour, baking soda, cinnamon and salt. In a separate bowl, mix together sugar, brown sugar, shortening and eggs.
Pour into a pan, alternating layers of the oat-flour mixture with the sugar-egg mixture. Bake at 350 degrees F for 45 minutes. Make the frosting and set aside.
Frost immediately after baking, then place under broiler until bubbles appear.
Mix everything together!