Vegi-heavy pasta sauce | Rowan Marshall

Ingredients

• 2 tins peeled plum tomatoes (~800g altogether).
• 1 onion, sliced thinly.
• 1-2 stick celery, diced.
• 1-2 bell peppers, sliced.
• 1 mediumish carrots, sliced (used to reduce acid taste)
• 70g butter or 50g olive oil (the “fat”).
• 3-4 garlic cloves, peeled but not cut.