Instead of using one and a half tins of tomatoes and wasting the other half, I used one tin, an extra spoonful of puree and a little extra water and it worked really well (deliciouslyella.com)
Blend into a thick creamy deliciousness, if you like it a little less thick add a little extra water. (deliciouslyella.com)
If for some reason it's not turning totally smooth then try putting the whole thing into a smoothie blender and blending it with a little extra water. (deliciouslyella.com)