In a mortar and pestle, pound together the garlic, chili sauce, and granulated sugar until they form a uniform, relatively smooth saucey paste. Set aside.
Cook the wheat noodles according to the packaging's instructions. Drain off excess water and run cold water through the noodles.
Heat 1 tbsp of canola oil on a medium-sized pot on medium high heat and stir-fry the chili sauce mixture for about 1 minute. Add the peanut butter and mix well until melted. Add in the water, low-sodium soy sauce, sweet soy sauce, and sesame oil and combine well until smooth. Once the sauce looks smooth and slightly thicker (it should have a similar texture to a white pasta sauce), remove from heat.
Before serving, run the noodles through cold water again and drain off excess water. Serve the noodles in shallow bowls and pour the sauce over the noodles. Add Lao Gan Ma black bean chili sauce oil and some green onions for topping.