Prepare the vegetables such as onions, bell peppers, celery, and tomatoes.
Heat olive oil in a large pot and sauté the onions.
Add the prepared vegetables and minced garlic, and sauté together.
When the vegetables are wilted, add the tomatoes and vegetable broth.
Season with salt, pepper, and other seasonings to taste.
Bring to a boil and simmer until the vegetables are fully cooked.