If you don’t know what to have for dinner tonight, you may find some inspiration in this 1976 filler starring Delia Smith. Delia serves us her top fuel-saving tip - cooking everything in the oven at once. Four dishes at gas mark four - including dad’s favourite!

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For those who lived through the 1970s, it is no surprise why this filler was made. The decade brought a wave of difficult energy and economic crises. An oil embargo, the Three-Day Week, and out of control inflation, would all have made it necessary for a  struggling population to save fuel. Even if the advice is simple, Delia was experiencing one of the most popular moments of her career as a trusted cook. She was a good choice as the face of this campaign, for both her connection to cooking and her audience-pleasing presence.