Although there is no culinary rule when it comes to how you should prepare pecans for pecan pie, there are quite a few recipes that you will find online which call for roasted pecans. How you choose to prepare your pecans for this type of dessert just depends on your own preferences and the type of taste you are going for.
Some people who make pecan pie choose to roast their nuts before putting them into the mix while others like to use raw pecans they buy from the store without roasting or preparing them in any special way. Although roasting your pecans will take away from some of the nutritional value, it can make for a very interesting taste.