Ingredients:
- Cooking spray
- 500g lean ground beef (less than 5% fat)
- 1 large onion, finely chopped
- 1 large carrot, finely chopped
- 2 celery stalks, finely chopped
- 2 large garlic cloves, crushed
- 1 beef bouillon cube, crumbled
- 3 tablespoons tomato paste
- 2 teaspoons Worcestershire sauce
- ½ teaspoon dried thyme
- 1 teaspoon Marmite (optional)
For the Topping:
- 800g potatoes, peeled and roughly chopped
- 200g parsnips, peeled and roughly chopped