Preheat the oven to 375 F.
Slice red onion.
Slice 1 lemon into thin slices.
Toss chicken thighs & the sliced red onions w/ 2T olive oil. Place both on a sheet pan and sprinkle w/ S&P.
Add ~1 cup olives and 1 cup drained artichokes to the pan nestled around the chicken. Place lemon slices over the top.
Bake ~35 mins until the chicken is cooked.
Cook angel hair pasta according to package directions.
Remove lemon slices. Spoon chicken mixture over pasta.