SO good and very easy. I made changes based on the reviews - used the flour and water mix but added some of the hot liquid into the bowl with the flour/water and whisked it together, then added it back into the pan. I didn't have any problems with clumping. I also added 3 whole garlic cloves and juice from 1/2 lemon to the sauce prior to simmering. I removed the cloves prior to serving. Made enough sauce to serve over angel hair with a side of green beans. Very good, healthy and simple! Highly recommend for a weeknight meal.