Step 1

Put the oil in a large pan and heat on medium.

Step 2

Once the oil is hot add the onions and cook for 2 to 3 minutes until translucent and just starting to turn golden on the edges. Then add the garlic and cook for 1 minute more, stirring frequently.

Step 3

Add the chopped tomatoes. Bring to a simmer and cook for 5 to 6 minutes until the tomatoes are simmering and just starting to break down. The smaller the tomato pieces, the quicker this will happen. Larger chunks might take a couple minutes more.

Step 4

Remove from the heat and add the basil, salt and pepper then blend with an immersion blender in the pan, or transfer to a blender, blend then return to the pan for a minute or two to warm up again.

Step 5

Serve immediately.