Wash carrot, onion, and broccoli thoroughly, then cut into bite-sized pieces.
Heat olive oil in a pan over medium heat.
Add onions first and sauté for 2 minutes.
Add carrots and broccoli, then stir-fry for 3 minutes.
Season with salt and pepper.
Pour in 100 ml of water, cover with a lid, and simmer for 5 minutes.
When the vegetables become tender, transfer to a bowl and serve.