Season chicken breasts with salt, pepper, paprika, and oregano on both sides.
Heat olive oil in a large skillet over medium heat.
Add chicken breasts and sear for 5-6 minutes per side until golden brown and cooked through. Remove from skillet and set aside.
In the same skillet, add diced onion and cook for 2-3 minutes until softened.
Stir in garlic and rice, cooking for another 1-2 minutes until the rice is lightly toasted.
Pour in chicken broth, sun-dried tomatoes, and sliced olives. Stir well.
Bring to a boil, then reduce heat to low. Cover and simmer for 15-18 minutes until the rice is tender and liquid is absorbed.
Slice the cooked chicken breasts and return them to the skillet, placing on top of the rice.
Sprinkle crumbled feta cheese and chopped parsley over the top.
Squeeze fresh lemon juice before serving. Garnish with cucumber slices, cherry tomatoes, or extra lemon wedges if desired.