This freezes really well (before adding the creme fraiche). If it's too thick after blending just water it down with some stock or water, or even milk. But I find that if you're freezing it, it's better to freeze a really thick concentrated soup.
This is probably my favourite soup of all time (and involves 2 of my favourite ingredients). You can spice it up with a bit of chilli oil but I like it plain.
Just fry 2(or so) onions(I use white but I guess red'd be fine) until they're soft in some olive oil. Throw in 2 tins of chopped tomatoes, and a peeled and diced butternut squash, along with about 500ml vegetable stock (enough go a bit over the veg as you can always add more later). Herb wise I use my usual combination of oregano parsley, sage rosemary, thyme and basil in varying propartions according to what I'm cooking. To be honest that's derived from Schwartz Italian Herb mix but with my own proportions. the easiest way to gauge it is to smell the food as you season (taste after a bit). Oh, I also throw in a bay leaf. Simmer until the squash is soft. Leave it to cool slightly then blend until smooth(remember to take out the bay leaf before you blend!), reheat and stir in some creme fraiche.
Fantasic with homemade pumpkin seed bread.