Heat olive oil in a large skillet over medium-high heat.
Once the oil is hot, add the garlic and onions and sauté for 1 minute, just until the vegetables are soft and fragrant.
Add the ground beef, salt, and pepper, and stir to combine.
Pour in ½ cup of water, and cook the ground beef with the garlic and onions, stirring constantly, just until the meat has browned, about 3 minutes. If there is a lot of greasy liquid, drain it out, leaving just about one tablespoon of liquid left in the pan.
Add the potatoes, carrots, and 3 tablespoons of the soy sauce. Stir and cook until the potatoes and carrots have softened, about 3 to 5 minutes. During this time, add water as needed to help cook the vegetables.
Add the tomato sauce, remaining 3 tablespoons of soy sauce, red bell pepper, peas, and sugar. Stir to combine, and cook until the veggies are all tender, about 3 to 4 more minutes. The sauce should thicken, but if there is a lot of excess thin liquid, feel free to drain it before serving.
Taste and season with more salt and pepper if needed. Garnish with chopped fresh parsley.