Isabel's Chicken Salad

I love good chicken salad. I thought the Lunch Box had the best chicken salad. But then, my friend Isabel made some chicken salad. It was outstanding. Even Graysen ate it (she hates mayonnaise). She loved it. The last time Isabel came over, Graysen grabbed her pencil and sketch book and wrote it down. We made it and loved it. Here's the best chicken salad you'll ever eat.

4 chicken breasts
1 1/2 onions
1/2 green bell pepper
1/2 red bell pepper
1/2 cup chopped pecans
1/2 cup mayonnaise
1 serrano pepper (seeded)
Kosher salt
pepper

Cook chicken breasts in slow cooker overnight or all day with water (2 inches above) and 1 onion quartered with salt and pepper. When done, shred chicken in a bowl. Seed and chop peppers and half of other onion and add to chicken. Add other ingredients. Serve over a bed of lettuce.