Preparation
1. In a stockpot, melt butter over medium heat. Cook onion in butter until softened. Add the garlic and cook a few minutes.
2. Stir in broccoli, and cover with chicken broth. Simmer until broccoli is tender, 10 to 15 minutes.
3. Reduce heat, and stir in cheese cubes until melted. Mix in milk.
4. In a small bowl, stir cornstarch into ½ c chicken stock until dissolved. Stir into soup; cook, stirring frequently, until thick.