Grease an 18 cm x 28 cm rectangular slice pan. Line base and sides with baking paper.
Process pecans, oats, puffed rice and cinnamon in a food processor until finely chopped. Add dates and honey. Process until well combined (mixture should form clumps when pressed together with clean hands). Transfer to a large bowl. Stir in carrot and raisins.
Press mixture very firmly into prepared pan. Cover and refrigerate for 6 hours, or overnight, until firm.
To make topping, place cream cheese, sugar and vanilla in a small bowl. Stir with a wooden spoon until smooth and creamy. Spread over base. Sprinkle with extra pecans.