The adaptation is really simple: I substituted 1 cup frozen blueberries (tossed with 1 tablespoon flour) and 1/2 cup walnuts for the almonds, canola oil, and cranberries called for in the original recipe. Blueberries are a nice addition to corn muffins, and blueberries and walnuts taste great together. Mix the blueberries and walnuts in after combining the wet and dry ingredients.
Original recipe here.