One way to remove burnt-on food from a stainless steel pan is to fill the pan with water and bring it to a boil. Then, add a generous amount of baking soda and let the mixture sit for a few minutes. After a few minutes have passed, use a spatula or other tool to scrape the burnt-on food from the pan. You may need to repeat this process a few times to remove all of the burnt-on food.
Another way to remove burnt-on food from a stainless steel pan is to fill the pan with vinegar and water and bring it to a boil. The acid in the vinegar will help loosen the burnt-on food so that it can be scraped away more easily. Again, you may need to repeat this process several times to remove all of the burnt-on food.