70th birthday loaf?

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I want to make a loaf as a surprise gift for a friend's 70th birthday.  She has been my most enthusiastic supporter  and taster on my baking journey, so I want to spoil her, and I'm up for a challenge.  Any suggestions?

 You could make a cob or batard and put a twist on the top in the shape of 70 or you could make a plait with  the shape of a 7 and 0

 similar to this but shaped for the purpose the twist can be rolled thinner perhaps.

 

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Thank you all for your suggestions which really stimulated my thinking (and ambition). Here’s an update on what I did. The dough is the Country Bread recipe, page 105 in Jeffrey Hamelman’s Bread book, shaped into a figure 70.  To maintain definition I chilled the dough for the final shaping and proofing, but it still lost some shape.  Also, during baking it expanded more than I was expecting but thankfully it just (and only just) still fitted in my domestic oven. It wasn't perfect, but it produced a big smile from the birthday girl and added to the fun.

Excellent choice and I bet she loved it!