Mix the Bisquick, bananas, granulated and brown sugar, rum and egg.  Mix until just moistened (will be lumpy). Fill tins 1/2 way full. Bake at 400° for 15 minutes.  Immediately remove from pan, cool 5 minutes.

Meanwhile for the glaze, mix the powdered sugar and the water until smooth. Dip tops of each muffin into glaze and then into chopped pecans

I usually line my muffin pans with papers. If you have nonstick pans, spray them and don't use the papers.