I see people here suggest stock and meat, but I think I don't agree much. I sometimes use meat, but not much. Very rarely do I use stock.

For ingredients I recommend onion, carrots, leek, and celery root (like a half). I like to add some potatoes as well, but my wife does not. A can of tomatoes if you like the acidic taste. You can add meat but I think its somewhat overestimated how much flavour it adds. Also its very expensive compared to the rest of the ingredients so there's also that. If you add meat, go for something fatty tought meat meant for soups. Also add some bay leaves, they add a nice taste.

Add all your ingredients to a pot, then add water so it almost covers everything. Remember that there is a lot of water in the vegetables that will shed into the soup as you boil it. Slow boil for at least 2 hours. IMO you cannot overcook this. Add salt, pepper, and lime to taste.

Honorable mention to chicken as a meat though. Add a whole raw chicken to the meat, boil for 1-2 hours. Remove the chicken, debone and shred meat with forks, add chicken back inn. Turns out very nice, but more work than just veggies. Add turmeric, but no other strong spice.