Cook pasta according to package directions until al dente. Drain and set aside, reserving 1 cup of pasta water.
In a large skillet over medium heat, melt butter and sauté garlic for 1 minute until fragrant.
Pour in heavy cream and chicken broth, stirring to combine. Bring to a gentle simmer.
Add Parmesan cheese and Italian seasoning, whisking until the cheese melts and sauce becomes smooth.
Stir in turkey and spinach, cooking until spinach wilts, about 2 minutes.
Add cooked pasta to the sauce and toss to coat. If sauce is too thick, add reserved pasta water a little at a time until desired consistency is reached.
Season with salt and pepper to taste. Serve immediately with extra Parmesan on top.