Heat up a wok and pour in the cooking oil. Add the garlic and stir fry until aromatic then add the bean curd and potato and tomato wedges. Do a few quick stirs and then add the yellow noodles and the Sauce and continue stirring until everything is well combined. Add sugar and salt to taste.
Add in the bean sprouts and quick stir for another 1 minute. Turn off the heat, dish out, garnish with the scallions, red chili, and fried shallots. Squeeze some lime juice over the noodles before eating.
You can get fresh yellow noodles from Asian supermarket. Yellow noodles are yellow in color and oily. If you can't find yellow noodles, just use spaghetti.