Place a skillet over medium heat and toast pecans for 3-4 minutes, watching so they don't burn. Set aside

In a large mixing bowl, toss together the cubed chicken, grapes, celery and onions. Set aside

In a medium mixing bowl, mash the avocadoes with the lemon juice and salt & pepper. Mash it until fairly smooth

Stir the avocado mixture with the chicken mixture. Add the toasted pecans and stir to combine

Store in the fridge in an airtight container