Growing up, my mother assembled a breakfast casserole on Christmas Eve so that the next day, all she had to do was stick the baking dish in ... to loading the French toast with blueberry flavor ...
Preheat the oven to 350 degrees. Coat a 9x12 glass baking dish with butter or vegetable oil. Toast the pecans in a single layer on rimmed baking sheet in the oven for 15 minutes. Set aside.