Steel cut oats?

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In my area, I have managed to find avoine décortiquée, aka whole grain oat groats at Naturalia, but nothing in between that and rolled oats. I don't mind the groats, but they take longer to cook.

When we were in Marseille, there was a Super U in the neighbourhood where we were staying and they had steel cut oats, but so far I haven't found any at the Franprix or Monop in Paris proper.

Otherwise, I may just try dumping some groats into my food processor to see if it yields something that resembles steel cut oats.

Thanks in advance !