Add the remaining 1 tablespoon of olive oil to the pan. Add the onions, carrot, and celery. Season with salt, pepper, and dried thyme. Cook, stirring occasionally, until the onions are translucent, about 6 minutes.
Add the garlic, stir, and cook for an additional 1 minute.
Add the cassava flour and stir to combine, coating all of the veggies. Cook, undisturbed for 1 minute, allowing the flour to toast slightly.
Add the tomato paste and begin to stir, cooking until the tomato paste begins to meld into the veggie mixture.
Pour in the balsamic and the coconut aminos to deglaze the pan, scraping the bottom of the pan to release all of the browned bits. Add the potatoes and the meatballs. Stir to combine.
Pour the beef bone broth into the pot and add the fresh thyme sprigs. Increase the heat to medium-high and bring to a rapid simmer. Reduce the heat to low, cover, and cook for about 20 minutes, stirring occasionally, until the potatoes are fork-tender.
Remove the thyme sprigs and add the frozen peas. Cook, uncovered, for an additional 5 minutes, or until the peas are warmed through. Taste for seasoning and adjust if needed.
Serve in shallow bowls and garnish with extra parsley.