Begin by bringing a large pot of salted water to the boil, and cook the pasta according to the directions on the package. As soon as you put the water on to boil, begin making the sauce.

In a large sauté pan, add the olive oil and garlic and cook the garlic for a minute or so, then add the sliced zucchini. Cook until the zucchini are beginning to brown, then immediately add the tomato sauce.

Keep the heat rather high so that the sauce simmers nicely. Add salt and pepper. 

Add some pasta water as needed, as you don't want the sauce to dry up too much.

After 10 minutes or so, the sauce should be ready. Put it in a blender and process until smooth, then pour back into the same pan over very low heat.

Add the cream and stir until completely blended. Taste for seasoning, and add some more pasta water if the sauce is too thick. 

Combine the Zucchini Sauce and Pasta and Serve!

When the pasta is al dente, add directly to the sauce in the pan and mix well. Turn off the heat and serve hot!