Cant help you with making the soup in a soup maker as Im a pressure cooker and stick blender maker.
Ones Ive made this week - sweet potato and red pepper, same quantity of each, chopped into decent sized chunks, added a couple of cloves of garlic, spray of oil, sprinkle of cumin and chilli flakes, roasted till softened and charring, enough stock to cover and cook till soft , blend. Sometimes when Im blending I need to add more liquid, other times is a bit watery so I just simmer a wee while. A wee bit of coconut milk added to that one makes it magnificent rather then just lush :)
Im doing curried parsnip this afternoon, with that I chop the parsnips into chunks, a bag full , add a chopped onion and a chopped apple, spray, sprinkle with curry powder - roast - stock - cook till soft, blend adding a drop of milk to make creamy. The apple should add a slight sweetness, if not I stir in a teaspoon of honey
Leek and potato - I tend to use one bag of leaks to two decent size spuds, I just chop up rough - just wash the spuds and leeks - throw in the saucepan , sprinkle of thyme, stock to cover , cook till tender - blend using some milk to make it creamy
I use a multi cooker so I do the roasting and pressure cooking and simmering if needed all in the one pot - takes no time at all
DH loves a broth, its very popular here, we buy bags of pre chopped carrots, parsley, leeks, and soup celery - which isn't the celery you are used to, and we use dried soup mix or barley to thicken. How I do that is, cover the bottom of the pan with washed barley, add stock and pressure cook for 15 mins on high, once that's done I throw in the well washed veg, throw in a couple of chicken thighs or drumsticks, cover with stock, pressure cook on high for another 10 mins, Once released, take out the chicken, discard the skin and then shred the chicken , stir back into the broth. Sometimes I blend some of the broth to make a really thick soup ( before I put the chicken in )
The stock is always the one posted further back and I find I rarely need to adjust seasoning , maybe some pepper