The neighborhood feathered friends will love visiting your yard for this homemade treat. Mix peanut butter and vegetable shortening; melt in a microwave for 1 and 1/2" minutes on high. Mix in quick-cooking oats, cornmeal, and flour. Pack mixture into two paper cups, then cool. Remove from molds, and place in mesh bag, plastic clip side down. Secure open end of bag, and hang feeder from branches at a good height above ground.