The How To
1. Filled subject pan with water to above the burn mark.
2. Dumped in a approximately 1/2 cup of baking soda.
3. Boiled the mixture for 5 minutes or so.
4. Turned off the heat and let the pan sit until cool.
5. Clean the pan using usual method of dish soap and sponge.
The burnt mark was EASILY removed!
I was quite impressed!