My mom really liked WW. My favorite WW food was the vegetable soup. I used to make a huge pot. On the old system, it could be made with no points, but I usually used a bit of oil for cooking the veggies. (A tablespoon of oil probably made three quarts of soup.)
Heat one tablespoon of oil in a large pot. Medium heat is probably good.
Add your firmer and more flavorful veggies (carrots, celery, onion, leek, shallot, etc.). Stir until they start to get soft, but don't let them brown. If you like mushrooms and have some fresh on hand, add them about halfway through cooking time. Add veggie stock and a large can of tomatoes (if you have them), and then some boiling water. You want to make sure that everything is covered. Let it come to a boil, then turn the heat down. Simmer about fifteen minutes. Add softer veggies, like cabbage and zucchini. Continue simmering about five minutes. Add any veggies that are pre-cooked (including canned and frozen) and any very soft greens (like spinach) and simmer until heated through. You may need to add more liquid. Season with fresh herbs (copious amounts of thyme is good) and pepper. You can get away with using less salt if you add a spoonful or two of red wine or balsamic vinegar.
You can have as much of this as you want, for the most part. If you want to add some substance (and points), add cubed potato in the first group veggies and/or kidney or white beans with the canned stuff.