Preheat oven to 190 degrees (fan)
Add the diced butternut squash into an oven tray (big enough so it’s all spread out), add the turmeric, paprika, S&P & 1 tbsp of olive oil and mix well so it’s all coated.
Add the garlic cloves, still whole with their skins on and put it in the oven for 30-40mins, until golden/caramlised (slightly dark) on the edges, I would stir half way through cooking to ensure an even cook. Remove from the oven.
Heat the remaining olive oil (1 tbsp), in a heavy bottomed casserole dish (or saucepan), add the onion and sweat down for 5-7 mins.