Savory Meat Filled Manicotti

• 14 pcs manicotti pasta (uncooked)
• 4 egg whites (slightly beaten)
• 425 ml homemade spaghetti sauce
• 270 gr chicken breast (ground)
• 220 gr fat-free mozzarella cheese (grated)
• 90 gr onions (chopped)
• 28 gr bread crumbs (white)
• 20 gr fat-free parmesan cheese
• 2 ml olive oil
• 1 gr oregano