1. Cream margarine and sugar in mixing bowl. Add beaten eggs and vanilla e xtract and whisk to blend well.
2. Combine baking soda, salt, flour and cinnamon; add to egg mixture and b eat until thoroughly mixed.
3. Add peeled and thinly sliced apples along with the chopped walnuts to b atter. Blend ONLY enough to spread apples and nuts throughout batter.
4. Grease and flour a 13 x 9 x 5 cm pan. Pour in the batter and bake in a preheated 325-degree oven for 1 hour.