Thought I'd share my easy soup "recipe", just in case it helps anyone.
Fry onion in a large saucepan/casserole dish/any saucepan.
Chop up, fairly small, any hard veg you have (eg carrots) and continue frying.
Chop up any other veg you have (literally ANYTHING) and add it, continue frying.
Add mixed herbs or any other herbs you have that you think might go well (oregano, basil, thyme etc) , bit of salt and pepper if you'd like.
Add enough boiling water to cover the veg you've cooked so it's all swimming around.
Add 1 or 2 stock cubes depending on how much water you've added.
Leave to simmer until it's all cooked.
When it's cooled* blend it all up (blender, stick blender, potato masher) or just blend a little bit to make it thicker - however you like it!
Season with more salt and pepper if needed.
Add milk or cream if you'd like.
Enjoy!
*it's much nicer to get splattered with cool soup rather than boiling soup. You will get a bit splattered.