Microwave each of the squashes for 6-8 minutes, remove from the microwave and allow to cool for 10 minutes.
Cut the squash in half widthwise and place it open end down on a cutting board. Slice from the top down to remove the skin all around.
Remove the tops and bottoms and then cut the halves lengthwise. Use a spoon to scoop out and remove all the seeds.
Cut the squash into 1inch cubes and place on a lightly greased baking sheet. Toss in the cloves of garlic (peeled) and season with salt, pepper, and olive oil. Mix everything together and bake for 40 minutes.
While the squash roasts, bring the spices and chicken broth to a simmer on the stove. Simmer for 40 minutes, or until the squash has finished cooking.
Once the squash has cooked blend the roasted squash with the simmered chicken broth and spices.
Serve warm with a splash of heavy cream and pumpkin seeds.
Notes
You can also add cayenne pepper or hot sauce if you like your roasted butternut squash soup extra spicy.