If your curry sauce is overly watery when you’re making creamy curry pasta, I recommend letting it cook with the lid off for a bit more time before adding the pasta and vegetables.  This cooking time will allow some of the water to evaporate from the pan.   If after cooking for additional time it’s still too thin you can add some cornstarch mixed into water to the pan. Start with one tablespoon of cornstarch to see if that thickens it enough for your tastes, add more one tablespoon at a time until you like the consistency. Allow the sauce to cook at a simmer for five minutes after each addition of cornstarch as it will thicken as it cooks. As a note, the thickness of the sauce in this creamy curry pasta is just thick enough to cling to the pasta when it’s mixed together. But if you want a thicker sauce, these are the steps I recommend taking.