Chicken Chilaqquiles

• 15 stale corn tortillas broken pi (into)
• 15 tortillas until crisp (fresh fried)
• 525 gr tomatoes (chopped)
• 475 ml sour cream
• 425 gr velveeta cheese
• 280 gr chicken (cooked chopped)
• 190 gr cans tomatoes
• 180 gr onions (chopped)
• 110 gr butter