The Chilean has already performed at centre-half, right-back, left-back and on the right side of midfield.
And yesterday he gave a masterclass on how to play in central midfield, capping his performance by rattling in a 30-yard corker five minutes from half-time.
That followed Graham Dorrans free-kick strike from 20 yards three minutes earlier.
Albion boss Roberto Di Matteo said after seeing his side open up a four-point gap over third-placed Cardiff: "What is Jara's best position? I cannot answer that yet. He has only been with us a short while.
"One reason we signed him was to get a player who can cover a number of positions. He can definitely play at a higher level than this."
Certainly plenty of big clubs will be seeing how he performs in the World Cup next summer.
Nigel Pearson's Foxes were restricted to a last-minute Bruno Berner strike from close range.
Pearson said: "I've no complaints. They were the better side."
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