Baked Tuna Chow Mein Casserole

• 7 tuna
• 300 ml cream of mushroom soup
• 100 gr celery (chopped)
• 60 gr chow mein noodles
• 30 gr onion (chopped)
• 28 gr butter
• 16 gr chow mein noodles with
• 14 gr butter
• 6 gr green pepper (chopped)
• 1 gr pepper