Wash the spinach thoroughly and drain the water.
Mince the garlic.
Heat olive oil in a pan and sauté the garlic.
Add the spinach and stir-fry until wilted.
Pour in milk and heavy cream, and bring to a boil.
Add Parmesan cheese to make the sauce.
Cook the spaghetti noodles and drain.
Mix the noodles into the sauce to finish.