Cut the carrot into bite-sized pieces. Place carrot, broccoli, and 1 tbsp water in a microwave-safe container, cover loosely with plastic wrap, and microwave at 600W for 3 minutes.

Finely chop the onion, place in a microwave-safe container, cover loosely with plastic wrap, and microwave at 600W for 30 seconds. Let it cool.

In a bowl, soak breadcrumbs in milk, then add the remaining meatball ingredients and mix until sticky. Divide into 10 portions, shape into balls, and coat with flour.

Heat salad oil in a frying pan over medium heat. Add meatballs and cook, turning, until all sides are browned.