Preheat oven to 450℉. Line a large rimmed baking sheet with parchment paper.
Add the first 7 ingredients to the pan and toss to coat all. Roast for 25 minutes or until fork tender.
To a large pot melt the butter on medium heat. Add in the roasted veggies and sauté for 3-4 minutes. Next, stir in the chicken broth, beef bone broth and soy sauce. Let it simmer for 20 minutes covered - season with salt and pepper to taste. Remove pot from the burner and use the emersion blender to blend together until its smooth. Add in the heavy cream.