1-2 tbs flour or tapioca starch
1/2 cup whole milk or cream
salt and pepper
In a large boiler, steam broccoli, then drain. Add chicken broth to cooked broccoli and use an immersion blender to puree.
In a separate pan, saute onions and minced garlic in butter. Add 1-2 tbs flour and mix with fork. Add 1/2 cup whole milk or cream. Add this mixture to the broth/broccoli and continue cooking it on medium heat. The flour/starch mixture will help thicken the soup. Salt and pepper to taste.