Kids' spaghetti and meatballs

Name: Kids' spaghetti and meatballs
Prep time: 30 min
Cook time: 30 min
Total time: 1 h
Cuisine: Italian
Ingredients: 4 cream crackers; 500g/1lb 2oz lean beef mince; 1 tsp dried mixed herbs; 1 free-range egg; 1 tbsp olive oil; 1 tbsp olive oil; 2 onions, finely chopped; 1 small carrot, grated; 1 garlic clove, crushed; 1 x 400g tin chopped tomatoes; 2 tbsp tomato purée; 500g/1lb 2oz spaghetti, cooked according to packet instructions; salt and pepper