Prepare the oven: Place a rack in the center of the oven and preheat to 450°F (232°C).
Prepare the green beans: Remove the tough stems of the green beans. You can leave on the non-stem ends, or trim them if you’d like. Then rinse and dry the green beans thoroughly. (If they’re too wet, they won't hold the seasonings that well and you’ll just feel silly!) Transfer the beans to a large cast iron skillet, baking dish, or parchment-lined baking sheet.
Season: Drizzle over the melted coconut oil and tamari, then sprinkle over the nutritional yeast, sesame seeds, mustard seeds, red pepper flakes, black pepper, curry powder, turmeric, coriander, cumin, and chili powder. Toss well to coat, using clean hands or tongs. (You can also season them in a bowl and transfer to your roasting vessel.)
Roast: Place the seasoned green beans in the oven and roast for 30 minutes, tossing once halfway through. After 30 minutes, give them a taste to check for seasoning and doneness. Once they’re fully tender and a bit crispy at the ends, they’re ready to enjoy!