Steps
1. Preheat the oven to 400°F (200°C). Wrap the beetroot in foil and roast for 45-60 minutes until tender.
2. Once the beetroot is cooked, let it cool, then peel and dice it.
3. In a large bowl, combine the fresh spinach, diced beetroot, sliced red onion, and avocado.
4. In a small bowl, whisk together the olive oil, apple cider vinegar, salt, and pepper.
5. Drizzle the dressing over the salad and toss gently to combine.
6. Sprinkle with roasted sunflower seeds if desired, and serve immediately.