Wash the onion, carrot, potato, and broccoli thoroughly, and cut them into bite-sized pieces.
Heat olive oil in a pot and sauté the chopped vegetables.
Once the vegetables are slightly cooked, pour in 500ml of water.
Season with bay leaf, salt, and pepper.
Simmer over medium heat until the vegetables are tender.
Add a little tomato sauce to taste.
Serve the finished soup in a bowl.