Bring a large pot of water to a boil, salt it, add the noodles and cook until tender.
In a large skillet, add about 1 tablespoon EVOO and the butter to melt over medium heat.
Add the garlic and shallot (or onion) and cook for 3 minutes.
Add the spinach to wilt (or heat through the thawed spinach).
Toss with noodles.