Add onions and mushrooms and saute for 5-7 minutes, until tender and liquid from the mushrooms has been mostly cooked off.
Add garlic and season with salt, pepper, and red pepper flakes and saute for another 30 seconds.
Increase heat to high then add in canned tomatoes and vegetable broth. Bring to boil.
Add capellini black rice noodles and stir until they wilt and fit in the pot. Cover pot, reduce heat to medium-low and cook for 5 minutes. (The liquid should be at a LOW boil this whole time.)
Remove lid and add fresh spinach, a couple of handfuls at a time, stirring to get the spinach mixed in and wilted.
Remove from heat and let capellini sit, covered, for a few minutes.
Stir in parmesan cheese.
Add the vegetarian capellini black rice noodles to the carved bell peppers.
Enjoy!
**NOTE:**
Slightly undercook your gluten free pasta because it tends to get gummy when overcooked. So instead of 5 minutes. Cook it between 3-4 minutes.
Want to learn how to make these cute Jack-O-Lantern stuffed bell peppers? Watch my video here: