In a large mixing bowl, whisk together the olive oil, lemon juice, lemon zest, minced garlic, thyme, oregano, salt, and pepper to create a marinade.
Place the chicken breasts into the bowl and ensure they are all well-coated with the marinade. Let them marinate for at least 30 minutes at room temperature (or refrigerate for up to 2 hours for a deeper flavor).
Arrange the marinated chicken breasts in a single layer in a baking dish. Drizzle any remaining marinade over the top.
Lay lemon slices on top of the chicken for added flavor and visual appeal.
Bake in the preheated oven for 25-30 minutes, or until the chicken is cooked through and reaches an internal temperature of 165°F (75°C).
Remove from the oven and let the chicken rest for 5 minutes before serving.
Garnish with fresh thyme sprigs before serving for an extra burst of flavor.
Notes
For deeper flavor, marinate the chicken in the refrigerator for up to 2 hours.