Half, deseed and brush butternut with oil. Pop in the oven for 1 hr or till soft (if it gets brown before being cooked cover loosely with foil.
Fry onion in oil for 5 mins, add in garlic + ginger + spices. Cook for 2 mins.
Bung in remaining sauce ingredients, stir and bring to a simmer.
Pour sauce into a high speed blender, blitz till silky smooth (you may need to do this is 2 batches to get that silky consistency)
The rest
In a saucepan saute red pepper in oil till soft (or any veg you fancy)
Add in chickpeas + sauce
Simmer for 7-10 mins or till chickpeas are soft (if the sauce gets too thick during cooking add a bit of water)
Stir through spinach till wilted.
Notes
Storing Keeps in the fridge for up to 3 day.Freezing The curry and sauce freezes really well. Make a big batch up, portion it up and pop it in the freezer. The sauce can also be frozen on its own, then warmed up and added to veggies and protein!