The skilful Roda JC forward almost signed for Ajax last summer but then coach Martin Jol couldn't agree a fee.
However, the 28-year-old has run down his contract and is keen to move to England.
Mowbray meeting: Anouar Hadouir (right) has met Boro's boss for talks
He said: 'I have been in England and got a tour of the training ground and the stadium. Also I have had a meeting with manager Tony Mowbray. I was very impressed. Middlesbrough plays in the Championship but has the attitude of a Premier League side.'
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?Explore more:People: Martin Jol, Tony Mowbray Places: United Kingdom
Source: Daily Mail
Source: Daily Mail