Preheat oven to 350 degrees or 325 degrees if using glass dish. In medium bowl, combine oats, flour, coconut, nuts, sugar, and baking powder. Add melted butter. Stir to form a crumbly mixture. Set aside. Combine condensed milk, lemon juice and rind. Pat half of crumb mixture on bottom of 9" square baking pan. Spread milk mixture on top and sprinkle with remaining crumbs. Bake at 350 degrees for 25 - 30 minutes.

Peel oranges, being careful to remove all outer white membrane. Remove sections. Take out seeds. Layer oranges, coconut and pecans. Cover and refrigerate 2 hours before serving.