Preheat oven to 350 degrees F. Add chicken breast to a glass baking dish, sprinkle salt & pepper on it and top each with a lemon slice.
Place in the oven and bake 20-25 minutes until completely baked through. While the chicken is baking, spiralize the squash noodles and set aside.
Then add the ingredients for the pesto to a food processor or blender and blend on high until the pesto is smooth.
Heat a skillet to medium heat, add half the pesto the skillet then the squash then the remainder of the pesto. Using a tongs, coat all the squash with the pesto about 2-3 minutes.
Remove from the oven and plate the squash in a bowl with the baked chicken and lemon and sprinkle with red chili peppers.
Notes
For leftovers, store chicken and squash pesto in separate containers.