Melt the butter in a large skillet over medium heat. Stir in the hazelnuts until toasted and golden, about 4-5 minutes. Move to a bowl and pour the remaining butter overtop.
In a jar or bowl, shake or whisk the olive oil, balsamic vinegar, fig preserves, garlic, oregano, and a big pinch each of salt and pepper.
Add the shredded Brussels sprouts, kale, and wild rice to a bowl. Toss with 3-4 tablespoons of the vinaigrette. Transfer to a serving platter and arrange the hazelnuts, cheddar, and avocado overtop. Drizzle with additional dressing. Serve at room temperature, or cold.
Notes
*To store: This salad is excellent cold or at room temperature. It will keep well for up to 5 days in the fridge.*To make vegan: Omit the cheese (or use a vegan alternative) and toast the hazelnuts in vegan butter.