In a large bowl or plastic bag, add the chicken, olive oil, lemon rounds, and thyme. Make sure the chicken breasts are fully coated and then let marinate for about 25-30 minutes.
When ready, season the chicken breasts on both sides with salt, pepper, and red pepper flakes. Cook the chicken in a grill pan over medium-high heat, about 6-8 minutes a side, depending on thickness (mine were pretty thick).
To serve, garnish with capers (I also like to grill a few of the marinated lemon rounds to add to the plate as well).
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