Season the chicken on both sides well with salt and pepper and drizzle with a little oil.
Heat an oven safe nonstick pan or grill pan on medium heat. Once hot, brown the chicken golden brown on both sides. Once browned, place the pan in the oven and cook to an internal temperature of 160 degrees using a thermometer. Then remove the chicken from the pan and set on a cutting board to rest for 5 minutes before cutting into bite sized pieces or slicing into strips.
In the meantime, bring a large pot of salted water to a boil. Cook the pasta according to the directions on the package. Once done, drain well. Stir in the pesto and chicken. Taste and adjust the seasoning with salt and pepper or more pesto.
Garnish with red pepper flakes and parmesan. Serve with bread.
Notes
Pro tips: Butterfly the chicken: Lay the breasts down on a cutting board, using a sharp knife parallel to the cutting board slice the breasts through the middle (carefully) all the way in half to create two equal halves.