One Pot Eggplant Parma Pasta

• 0.25 cup sunflower seeds
• 0.25 cup pepitas (pumpkin seeds)
• 2 tbsp sesame seeds
• 1 tbsp extra virgin olive oil
• 1 large eggplant, diced
• 1 red onion, thinly sliced
• 2 cloves garlic, crushed
• 700 g passata
• 1 tbsp Italian seasoning
• 400 g wholemeal penne pasta
• 1 cup mozzarella, grated