Andouille Smoked Sausage In Red Gravy

• 900 gr pork
• 400 gr andouille smoked sausage
• 350 gr onions
• 240 gr onions on top
• 120 gr green onion tops (chopped)
• 110 gr celery (chopped)
• 180 ml stock
• 65 gr green peppers (chopped)
• 50 gr butter (unsalted)
• 40 ml tomato sauce