Cook pasta in salted water until al dente and reserve 1/2 cup pasta water before draining.
Season chicken with salt and pepper.
Heat olive oil in a skillet and cook chicken 5–7 minutes until golden and cooked through, then remove.
In the same skillet, sauté garlic 30 seconds until fragrant.
Stir in ricotta, parmesan, Italian seasoning, and a splash of pasta water until smooth.
Add cooked pasta and chicken back to the skillet and toss to coat evenly.
Add more pasta water if needed to loosen the sauce.
Stir in spinach until wilted, garnish with parsley, and serve hot.