Easy Cobb Salad

bone-in, skin-on chicken breast halves (about 10 ounces total)

extra-virgin olive oil

Coarse salt and ground pepper

hard-cooked large eggs

shredded romaine lettuce (from 1 large head)

fresh lemon juice

slices cooked bacon, crumbled

plum tomatoes, roughly chopped

blue cheese, crumbled (1 cup)

avocado, pitted, peeled, and diced medium