Bring a pot of salted water to a boil over medium/high heat.
Cook according to package directions and drain reserving 1/2 cup pasta water.
Heat the olive oil over medium high heat and stir in the garlic. Cook for 1 minute.
Turn the heat to low and whisk in the half and half, heavy cream, garlic powder, onion powder and Italian Seasoning. Cook until slightly thickened, approximately 3-5 minutes.
Stir in the cheese and cook until smooth.
Add the spinach and cook until beginning to wilt.
Fold in the tortellini and toss until coated.
Season with salt and pepper. Garnish with basil, parsley and crushed red pepper, if desired.
Notes
Asiago tortellini can be made up to 24 hours in advance. Reheat slowly over low heat or in the microwave until warmed through.