Preheat oven to 425°F.
Cut butternut into cubes and place on a parchment lined baking sheet. Drizzle with olive oil, 2 tsp sumac, salt and pepper. Roast for 20-25 minutes until golden.
Slice pear and place on a parchment lined baking sheet. Drizzle with honey. Roast for 20 minutes.
Wash and cut leeks and red onion. Sautée with 1 tbsp olive oil until softened. Stir in balsamic and cook until onions start to caramelize.