One Pot Chicken Parma Pasta

• 1 cup panko breadcrumbs
• 1 tbsp extra virgin olive oil
• 500 g chicken breast, diced
• 1 red onion, thinly sliced
• 2 cloves garlic, crushed
• 700 g passata
• 1 tbsp Italian seasoning
• 400 g wholemeal pasta
• 100 g spinach
• 1 cup mozzarella, grated