Step 1. Blend sturdier ingredients and liquid base
Add broth (should be warm but not boiling hot) along with ingredients you'll be using for your soup, like the thawed peas, green onion, salt, pepper and avocado into your blender's jar. Secure the lid, and start blending slowly, gradually increasing the speed. Blend for about 5 minutes. As a general rule, start by first blending your sturdier ingredients and liquid base before adding your more delicate herbs or other softer items.
Alternatively, if you're working with an immersion blender, you can add the ingredients to the pot used to make the vegetable broth. Blend until your preferred consistency, making sure that the blades are fully submerged before turning on.