Season chicken breasts with salt and pepper.
Pat them dry with paper towels.
This helps them brown nicely.
Set aside while you prep vegetables.
Add olive oil to your skillet.
Heat it over medium-high heat.
Wait until the oil shimmers slightly.
This means it's ready for cooking.
Place chicken breasts in the hot pan.
Cook for 5 minutes on each side.
They should turn golden brown.
Remove chicken and set it aside.
Add sliced onion to the same pan.
Cook for 3 minutes until soft.
Add chopped garlic and cook 1 minute more.
The kitchen will smell amazing now.
Toss in cherry tomatoes and black olives.
Sprinkle oregano and basil over everything.
Stir everything together well.
Let it cook for 2 minutes.
Place chicken back in the pan.
Pour chicken stock around the pieces.
Bring everything to a gentle simmer.
Cover and cook for 15 minutes.
Check that chicken is cooked through.
Remove from heat when done.
Garnish with fresh basil leaves.
Add lemon wedges on the side.
Serve immediately while it's hot.