Cheesy Cauliflower Casserole

• 3 cauliflower in (cut pieces)
• 2 eggs (hard cooked chopped optional)
• 1 onion (chopped)
• 475 ml milk
• 120 gr american cheese cubed
• 110 gr cheddar cheese (grated)
• 95 gr cheese crackers (crushed)
• 55 gr butter melted
• 24 gr flour
• 18 gr green pepper (chopped)