Cook the Potatoes: Heat 2 tablespoons (30 ml / 1 fl oz) of neutral oil in a large skillet over medium-high heat.
Add the diced potatoes, season with salt and pepper, and cook without moving for about 5 minutes, until the bottoms are browned. Gently toss and reduce heat to medium.
Continue cooking, stirring occasionally, for 10-15 minutes more, until crisp, golden, and tender.
Transfer to a large platter. 2. Crisp the Tempeh: Add 1 tablespoon (15 ml / 0.5 fl oz) of oil to the same skillet over medium-high heat.
Add the crumbled tempeh and cook, stirring frequently, until deeply browned and crisp on all sides, about 5-7 minutes.
Add the cooked tempeh to the platter with the potatoes. 3.
Sauté the Aromatics: Add the final tablespoon of oil to the skillet.
Add the onion, ginger, and garlic and cook for 1-2 minutes until they begin to soften.
Reduce the heat to medium-low and cook, stirring occasionally, for about 20 minutes until deeply caramelized and sweet.
Remove from heat. 4.
Mix the Sauce: While the onions cook, whisk together the minced chile, soy sauce, sesame oil, rice wine vinegar, and sugar in a small bowl. 5. Assemble the Hash: Return the skillet with the onion mixture to medium heat.
Add the cooked potatoes and tempeh back to the pan and stir for a few minutes until everything is heated through.
Pour the sauce over the hash and toss to coat, scraping up any delicious browned bits from the bottom of the pan.
Stir in the chopped red bell pepper and cilantro.
Taste and adjust seasoning with more salt and pepper if needed before serving hot.
Don't crowd the pan! Give the potatoes and tempeh plenty of space in the skillet to ensure they fry to a perfect golden-brown crisp rather than steam. If your skillet isn't large enough, cook them in two separate batches.