ADD potatoes and salted water to a pot, covering the potatoes by about 2 inches.
BRING to a gentle boil, reduce heat to medium, and cook until potatoes are soft when pierced with a fork, for about 11 to 13 minutes. Drain and set aside.
HEAT olive oil in a large skillet over medium heat.
ADD minced garlic and sauté for 1 minute. Add diced onion and continue to sauté for 5 to 7 minutes, stirring occasionally. Next, add shredded carrots, 1 tsp salt, and 1/4 tsp black pepper, and continue to cook for 5 minutes.
SPRINKLE cassava flour evenly over the vegetables and stir until combined.
INCREASE heat to medium-high and pour in cashew milk. Stir, bringing to a gentle boil. Reduce heat back to a simmer and stir occasionally until sauce has thickened. Taste and adjust salt and pepper as needed.
ADD boiled potatoes to the skillet once the sauce is thickened. Stir until combined and heated through. Stir in fresh parsley and serve.