In large saucepan, heat oil over medium heat. Add onions and garlic; salt and pepper to taste. Sauté until onions are softened (about 3-5 minutes).
Add broccoli; sauté 2 minutes. Stir in soup, cheese, half & half and broth; bring to a simmer.
Simmer 10 minutes or until cheese is melted and soup is heated through. Serve with croutons, if desired.