Blackened chicken tops a creamy Cajun-spiced pasta that's loaded with savory peppers and onions in this quick dish. We add a generous portion of greens to make this a healthy, though indulgent, weeknight dinner.
Bring a saucepan of water to boil. Salt generously and add pasta. Cook until al dente, tender but not soggy. Drain and reserve 1/2 cup (118 mL) of pasta water (for 4 servings; adjust accordingly if customizing).
While pasta cooks, heat a skillet or saute pan over medium-high heat. Add first part of cooking oil and then chicken. Cook in batches until cooked through, 3 to 4 minutes on each side. Transfer chicken to a cutting board and return pan to the burner.
To the hot pan, add second part of cooking oil and then onions, bell peppers and garlic. Saute until tender, ~4 minutes. Add spinach, tomato paste, heavy cream and reserved pasta water (if pasta is still cooking, just use a measuring cup to scoop water out of the pot) and stir to combine. Simmer until liquids reduce to a thick sauce and spinach is wilted, 1 to 2 minutes. Toss in pasta and stir until sauce coats pasta. Season with some salt and pepper.