ING/ER/PIC: does Nigel want seasoning on the chicken? There's salt and pepper here, but not used
Coarsely chop walnuts.
Pat chicken dry,
Place a medium non-stick pan over medium heat and add 1 tsp. olive oil. Add chicken to hot pan and cook until browned, 5-7minutes on one side.
Flip chicken, and top evenly with Parmesan and walnuts. Cook until chicken reaches a minimum internal temperature of 165 degrees, 5-7 minutes.
Transfer to a plate. Reserve pan; no need to wipe clean.
While chicken cooks, cook vegetables.
[PIC: chicken with Parm and walnuts on it]