Cook the pasta as per box directions but take it out ‘al dente’ (little under done with a bite)
Start a large skillet, add olive oil
Saute garlic, mushrooms and spinach for 3-4 minutes
Sprinkle the flour on top and mix well
Add the milk and mix until smooth
On a low flame, stir to form a creamy sauce
Add cheddar cheese and melt completely into the sauce
Add the shells pasta and mix until well coated
Sprinkle liberally with parmesan cheese (optional)