One Pot Lemon Garlic Parmesan Pasta

15min · 8 servings 16 oz shellbow pasta or pasta shells • 4 cups low sodium chicken broth or vegetable broth • 4 cloves minced garlic • 1 cup heavy cream • 1/2 cup grated parmesan cheese • 1/2 cup parmesan cheese shavings • 1/2 cup chopped Italian parsely • 3 cups fresh baby spinach • 1 tsp salt, more or less to taste • 1 tsp fresh ground black pepper, more or less to taste • Lemon zest from 1 lemon • juice of 1/2 lemon