Heat the olive oil in a large saucepan over medium heat. Add the mince and fry until browned.
Add the onion, carrot and celery and fry for about 6 minutes until fragrant.
Add the garlic, zucchini and potato and fry for a further 5 minutes until the vegetables are softened.
Add the passata, beans, stock, stock cube and salt and bring to a simmer. Continue to simmer, covered, for 30 minutes.
Stir through the spinach and allow to wilt. Serve with the bread.
