01 - Preheat oven to 425°F. Line a baking sheet with parchment paper for easy cleanup.
02 - Toss halved potatoes and chickpeas with olive oil, salt, pepper, and minced garlic. Spread evenly on the prepared baking sheet. Roast for 25-30 minutes, stirring halfway through, until potatoes are crispy and chickpeas are golden.
03 - Combine rinsed quinoa and 2 cups water in a saucepan. Bring to a boil, then reduce heat to low, cover, and simmer for 15 minutes until water is absorbed. Remove from heat and let stand covered for 5 minutes. Fluff with a fork before serving.
04 - Whisk together gochujang, soy sauce, sesame oil, rice vinegar, maple syrup, and water in a small bowl until smooth and well combined.
05 - Heat a large skillet over medium heat. Sauté sliced red onion for 2-3 minutes until softened. Add roasted potatoes and chickpeas to the skillet. Pour in the gochujang sauce and toss to coat evenly. Cook for another 2-3 minutes until everything is heated through and well-glazed.
06 - Divide cooked quinoa among serving bowls. Top with the gochujang-glazed potatoes and chickpeas mixture. Garnish generously with toasted sesame seeds and sliced spring onions. Serve immediately while warm.