Creamy Lemon Pasta with Spinach & Tomatoes

extra virgin olive oil 2 cloves garlic, minced 1 cup heavy cream 2 lemons, zested and juice reserved 1/2 teaspoon salt 1/4 teaspoon black pepper 1/2 pound rotini pasta 3 ounces baby spinach 1/4 cup grated Parmesan 1/2 pint grape or cherry tomatoes, halved