Step 1

Place the carrot, zucchini, onion, garlic cloves and celery in a blender. Process until you have pureed the vegetables together.

Step 2

Heat the olive oil in a saucepan over medium heat. When it's hot, add the pureed vegetable and cook until the moisture has evaporated and it starts to caramelize and turn brown.

Step 3

Add the tomato to the vegetables. (Note : if you're using whole tomatoes, crush them with your hands, or pulse them in the blender to help break them up).

Step 4

Add the tomato puree, vinegar, sugar, cayenne pepper and a generous pinch of salt and simmer for about 20 minutes. Add the oregano and simmer for another 10 minutes.

Step 5

Season to taste as you go.

Step 6

You can store the marinara sauce in a bottle in the fridge.