Spread out the cut vegetables on 2 large oven trays. Drizzle them generously with olive oil and roast in the oven at 170°C fan (190°C conventional / 375°F / gas mark 5) for 30-45 minutes until the squash flesh is soft and easily pierced with a knife.
4 tbsp olive oil, 2 medium butternut squash*, 4 red bell peppers, 2 red onions, 1 medium bulb of garlic
Remove the roasted vegetables from the oven and carefully transfer the roasted red peppers and onions to a large blender using a spatula.
Once roasted the flesh of the garlic cloves should be soft almost like a paste. Once cool enough to handle, squeeze the garlic cloves out of the skin of the garlic bulb into the blender (see the recipe video for a demonstration).
Once the squash is cool enough to handle, scoop the flesh of the squash out of skin and discard the skin.
Add the hot water to the blender along with the sriracha, lime juice and seasoning. Blend until the soup is smooth. Add more water if you prefer a soup that is less thick.
1-2 tbsp sriracha, 600 ml hot water, Juice of 1/2 lime
Taste for seasoning and add more sriracha, lime juice, salt and pepper as desired.
Serve warm with buttered toast.