entrelarder

to place pieces of bacon into meat; (obsolete) to interlard; to furnish something all over by interweaving, or interspersing, often as to embellish: to adorn, to interlard; to insert, spray, bestrew something in various parts

“entrelarder un filet de bœuf” — to interlard a beef fillet

Inherited from Middle French entrelarder, itself from Old French entrelarder (“to thrust into the flesh”) (1176-1181). By surface analysis, entre- (“(in) between”) + larder (“to lard”).