In a large bowl, toss chicken with olive oil, oregano, garlic powder, paprika, salt, and pepper.
Heat a large skillet or Dutch oven over medium-high heat.
Add chicken and cook for 5–6 minutes until browned and nearly cooked through. Remove and set aside.
In the same skillet, add uncooked orzo and toast for 1–2 minutes, stirring frequently.
Pour in chicken broth and bring to a gentle boil.
Reduce heat and simmer for 8–10 minutes, stirring occasionally, until the orzo is tender and most of the liquid is absorbed.
Stir in cherry tomatoes and spinach. Cook for 2–3 minutes until spinach wilts.
Return chicken to the skillet and stir in lemon juice and lemon zest.
Remove from heat and sprinkle with feta cheese and fresh parsley.
Serve warm and enjoy.