Dice the onion, garlic, carrot, and celery.
Heat olive oil in a pot and sauté the garlic.
Add the onion, carrot, and celery and stir-fry together.
Add cauliflower, broccoli, and tomato.
Pour in 400ml of water and bring to a boil.
Season with bay leaf, salt, and pepper.
Once the vegetables are tender, the soup is ready.