Here are a couple articles you should read about microwaving food and then you can decide about the safety of microwaving food. I use the microwave but am considering buying a small convection oven, which is healthier and cooks faster than a conventional oven.
Roberta, here is a recipe called Cranberry Dump Cake, which may be similar to what you are looking for, although it has pineapple in it also (you could always add the walnuts). The ingredients are:
1 package SnackWell's or low fat white cake mix
1 can crushed pineapple in juice -- (20 oz.) undrained
1 can cranberry sauce -- (21 oz.)
1/2 cup margarine, imitation low fat
Dump undrained pineapple in pan. Spread evenly. Dump in cranberry sauce and spread. Dump cake mix onto cranberry layer. Spread evenly. Dot butter evenly on top. Bake at 350 degrees for 48 to 53 minutes. Serve warm or chilled.
