Soups currently in the freezer:
Spinach and potato - fry up an onion and chopped spuds until softened, stir in a big bag of spinach, add veggie stock (marigold bouillon is what I use), season with salt and pepper, simmer for 20 mins, whizz with the stick blender.
Mushroom - as above but with slightly less spud (it's still good for thickening though), and 700g mushrooms rather than spinach. tarragon's nice in this if you have it, but it's tasty without.
Leek and potato, unsurprisingly, somewhat similar to the above 
Broccoli and stilton's another favourite, using frozen broccoli as said above, stir in some crumbled stilton at the end.
you can add cream to them, although i tend not to. Makes at least 4 portions and freezes well. I love autumn, and soup!