Bibimbap (Korean mixed rice with meat and vegetables)

Ingredients

• 1/2 yellow onion
• 2 cups hot cooked rice, about 1 cup (210g) for each serving
• 2 tbsp neutral-tasting oil, divided
• 3-4 shiitake mushrooms
• 1/3 carrot (80g)
• 1/3 zucchini (80g)
• Handful of microgreens (optional)
• 2 sunny-side-up eggs, to serve
• 2 tsp toasted sesame oil, divided
• Yakgochujang (or regular Korean chili paste), to serve