Peel and chop all your vegetables into chunks. Peel your garlic and trim off the ends. Get rid of any seeds or bits you don't want to eat.
Preheat your oven to 400 degrees Fahrenheit.
Put all your vegetables on a baking sheet, coat with some olive oil, and sprinkle with salt.
Roast your vegetables for 45 minutes, stirring occasionally.
Remove from the oven and let them cool down just a little bit.
Combine your vegetables with all your other ingredients. Blend your soup using the machine of your choice.
Serve immediately, garnishing with chopped scallions, chives, parmesan, or any other preferred topping.