If you aren't using precut vegetables mixes, then prepare vegetables according to the indications in the ingredients list.
Sauté the soup base vegetables in the oil over high heat until aromatic.
Add all the other ingredients to the pot. Cover and cook for 25-30 minutes.
Taste and adjust seasoning to your liking.*
Notes
* I ended up adding 3.5 teaspoons salt in total. Start with 2.5 and see if you need more - better to under-salt and adjust than to over-salt and correct.