Warm the pan: Heat a large skillet over medium heat.
Add oil and let it shimmer.
Brown the turkey: Add ground turkey and cook, breaking it up with a spatula, until lightly browned and mostly cooked through, about 5–6 minutes. Season with a pinch of salt and pepper.
Sauté the veggies: Add onion, bell pepper, and celery. Cook until softened and fragrant, about 4–5 minutes.
Stir in garlic and cook 30 seconds more.
Layer the spice: Sprinkle in Cajun seasoning, smoked paprika, red pepper flakes, remaining salt, and black pepper. Stir well so the spices coat the turkey and veggies.
Tomato depth: Add tomato paste and cook for 1 minute to caramelize slightly. This builds a deeper, savory base.
Deglaze: Pour in chicken broth, scraping up any browned bits from the bottom of the pan.
Simmer 2–3 minutes to reduce slightly.
Make it creamy: Reduce heat to medium-low. Stir in the cream and simmer gently until the sauce thickens enough to coat a spoon, about 3–5 minutes.
Add the cheese: Stir in Parmesan until melted and smooth. Taste and adjust seasoning, adding more salt or Cajun seasoning if needed.
Finish with greens: Fold in spinach and cook until just wilted, 1–2 minutes.
Stir in lemon juice for brightness.
Serve: Spoon over rice, pasta, or cauliflower rice. Garnish with parsley or green onions and serve hot.