Heat a large skillet over medium-high heat. Add oil to pan; swirl to coat. Add pork to pan; cook 5 minutes. Add salt and garlic and continue cooking until pork is thoroughly cooked, about 10 to 15 minutes.
Add red chile sauce, tomato sauce, oregano, and cumin. Let mixture come to a boil and add water to desired consistency. Simmer for another 10 minutes to let the flavors come together.
The stew can be refrigerated for up to 4 days. Rewarm over moderately low heat or microwave.