If you are planning to serve with pasta it's best to start cooking that first so it's, drained, still hot and ready to serve as soon as the sauce thickens up.

Spiralize the zucchini, one fat 7- 8 inch zucchini will usually yield 4 cups.

Cut the zucchini noodles into manageable lengths for eating. 

Cook the 'zoodles' for 30 seconds to 2 minutes in the microwave, in 30 second bursts to avoid overcooking. You want them 'just cooked' and not soggy. 

Pour off any water and let them sit on kitchen paper and pat dry to absorb more water. If you fail to remove the water adequately from the noodles the excess water will dilute your Alfredo sauce, so don't skip this step.

In a large wide skillet melt the butter over a medium heat with the garlic

Add the heavy cream and warm until it's simmering for about two to three minutes, stirring all the time.

Add the grated Asiago cheese, grated Parmesan cheese, and heat it until the sauce is bubbling over a medium heat, stirring all the time.

Season to taste with salt and pepper and serve right away over pasta, or low carb noodles of choice.