Roast the peppers, onion and sweet potatoes in a light coating of rapeseed oil in an oven preheated to 180 degrees until they are lightly browned. (deenakakaya.com)
Thanks Gillian, I used rapeseed oil in the loaf but it's not essential, it tends to make a softer crumb but any vegetable oil will work well. (talesfromthekitchenshed.com)
Asian and Indian cultures used rapeseed oil for centuries, but it was never consumed in the large quantities that Americans do. (thealternativedaily.com)