Bill's Favorite Mushroom Soup

• 10 mushrooms (dried)
• 3 stems portabello mushrooms fine (chopped)
• 1 onion fine (chopped)
• 1 garlic clove (minced)
• 950 ml water (hot)
• 475 ml cream (heavy)
• 55 gr butter
• 30 gr hega beef base
• 24 gr flour
• 3 gr pepper coarsely (crushed)