Preheat oven to 400°F/ 200° C
Cut butternut in half and scoop out the seeds with spoon.
Wash Peppers. Wash and trim tops off carrots
Peel and halve onion.
Peel off papery layers of head of garlic and cut the top to expose the cloves.
Add all vegetables to roasting pan. Drizzle olive oil over everything and season butternut with salt and pepper.
Roast in oven for 50 minutes or until butternut is soft.
During roasting time rotate red peppers so the skins blackend on each side.
Remove from oven and allow to cool enough to handle.
Peel, seed, and dice apple.
Peel the skins off the red peppers and remove the core and seeds.
Scoop the flesh off the butternut out of the peel.
Squeeze half the garlic cloves out of the bulb (reserve the other half for another time).
Add butternut, red pepper, carrots, onion, garlic, and 1 cup water to blender.
Blend on high.
Add diced apple, yogurt, milk, and harissa. Blend on high until smooth.
Pour soup puree into pot and heat on stove over medium heat until heated through, stirring regularly.
Season with salt and pepper.
Serve and garnish.