Many dishes were ruined because my toaster oven temperature was off. I finally checked it out with a digital & an oven thermometer(s). Now I manually adjust the temperature & dishes turn out better. Invest in a reliable oven thermometer to avoid wasting money on ruined dishes. 

See my picture for detailed examples. 

[![enter image description here][1]][1]


  [1]: https://i.sstatic.net/Vl1ZQ.jpg
[Picture source](https://i.sstatic.net/Vl1ZQ.jpg).