Slice sweet potato and onions then spread on nonstick sheet pan. Drizzle olive oil over top (optional). Half tomatoes and spread of baking sheet as well. Roast in oven for 30-40 minutes or until all veggies are soft.
In a large pot bring vegetable broth to a simmer.
Add in all ingredients (including baked veggies once they are done).
Take the pot off heat and let cool for 5-10 minutes.
Transfer to a blender, or put your immersion blender in pot. Blend all ingredients until fully smooth.
Garnish with whatever you would like! Serve.
* Watch the tomatoes! They sometimes burn easily. If they start to get black on outside, remove them from the oven and set aside.