Spaghetti with stuffed meatballs in tomato sauce

Ingredients

• 400g spaghetti
• 500g minced beef
• 2 tbsp finely chopped oregano
• 2 tbsp finely chopped basil
• 1½ tbsp finely chopped rosemary
• 1½ tbsp finely chopped sage
• 1½ tbsp mustard
• 1 egg
• 1 tbsp breadcrumbs (optional)
• ½ bag of mini mozzarella balls (150g)
• 100g cherry tomatoes
• 3 tbsp olive oil
• 2 shallots
• 2 cloves of garlic
• ½ red chilli pepper
• 1 bunch of basil
• 500g passata (sieved tomatoes)
• 2 tbsp olive oil
• 1½ tbsp balsamic vinegar