Test your vegetables (poke with a fork to see if they are tender/ eat some of them) to see if they are cooked.
Once they are cooked to the desired consistencey, transfer to the blender.
NOTE: You may need to do batches.
NOTE: Some blenders require that food is below a certain temperature, you may want to check the manual.
Process until the soup is velvety and smooth, yet retaining texture from the vegetables.