Crab Stroganoff

• 230 ml non-fat sour cream sub
• 130 gr crabmeat (fresh)
• 120 gr onion (finely chopped)
• 60 ml sherry
• 50 gr celery (finely sliced)
• 30 gr spinach noodles
• 28 gr diet margarine
• 16 gr flour
• 1 gr salt
• 1 package mushroom caps