01 - Toss chicken cubes with paprika, salt, and black pepper until evenly coated.
02 - Heat 1 tablespoon butter in a large skillet over medium-high heat. Add seasoned chicken and cook until golden brown and cooked through, approximately 5–6 minutes. Transfer to a plate and set aside.
03 - Reduce heat to medium. Melt remaining butter in the same skillet. Add minced garlic and chopped onion, sautéing until fragrant and translucent, about 2–3 minutes.
04 - Stir orzo into the skillet, toasting lightly for 1 minute while stirring constantly to prevent burning.
05 - Pour in chicken broth and whole milk, stirring well to incorporate and scraping up any browned bits from the bottom of the skillet.
06 - Bring mixture to a gentle simmer. Cook uncovered, stirring occasionally, for 8–10 minutes until orzo is mostly tender and most of the liquid has been absorbed.
07 - Stir in heavy cream and reserved cooked chicken. Add chopped spinach and Pepper Jack cheese, stirring continuously until spinach wilts and cheese melts completely, 2–3 minutes.
08 - Taste and adjust seasoning with additional salt and pepper if desired. Garnish with fresh parsley and serve immediately with lemon wedges on the side.