Spinach Beef Cannelloni (Manicotti)

Heat oil in a large saucepan or pot over medium high heat. Add garlic and onion, cook 2 minutes. Add carrot and celery, cook 5 minutes.

Add remaining Sauce ingredients then stir. Bring to simmer, lower heat to medium, cover with lid and simmer for 10 minutes.

Use a stick blender to blitz until smooth (or cool slightly and use blender or food processor). Set aside.