In a large pot, heat the olive oil on low.
Add the spring onion and soften for about 5 minutes.
Add the potato (no need to skin it - just dice or cube and toss it in)
Add frozen broccoli straight from the freezer - no need to thaw.
Add about 500 ml water. Just enough to barely cover the vegetables.
Pop a lid on the pan and bring the heat up to high.
Make sure the soup doesn't boil over and leave on medium - high heat for about 20 minutes until the vegetables are mushy.
Stir the two stock cubes into the soup.
Pour into a blender or using a stick blender, puree the soup until smooth.
Season to taste.
Serve as is or you can dress this up by adding a slice of garlic toast, a swirl of garlic oil or a small dollop of sour cream.