Creamy broccoli soup

Recipe (4servings)
1tbsp olive oil
1/2 small onion, chopped
1 heaping tbsp flour
1clove garlic, chopped
2small head broccoli
4cups water
1 1/2tsp salt
1tsp garlic powder
1/4tsp black and white pepper
2 slices cheddar cheese
1/4cup each Milk and whipping cream

1) hot oil in a pot, fry onions and garlic until golden, sprinkle flour and mix together quickly. Add in broccoli florets and water, bring to a boil then cook till the broccoli is soft to blend.
2) transfer the broccoli water to a blender, blend until a smooth mixture is resulted. Pour the mixture back to the pot.
3) add in the broccoli stems, spices, cheese, milk and cream. Cook until stems are ready to eat and soup is creamy.