Preheat oven to 350F (175C).

Spread 1-2 cups of pecans evenly over an ungreased baking sheet (note that nuts may toast faster on dark baking sheets and slower on light-colored ones).

Place baking sheet with pecans in 350F (175C) preheated oven and toast for 4 minutes. Remove from oven and use a spatula to stir/turn pecans. Return to oven for another 4 minutes.

Remove baking sheet from oven. Nuts should smell toasty and will be very slightly deepened in color once finished baking. If yours are not yet, return baking sheet to the oven in 2 minute increments, stirring in between, until pecans are toasted.

Allow to cool before using as desired.

Place a medium-sized skillet over medium heat.

Working with 1 cup of nuts at a time, add nuts and stir frequently until nuts are toasted (deepened in color and you can smell a nutty, toasty aroma, about 5 minutes).