Purée all ingredients, except juice and nuts, until smooth. Add a tablespoon or two of of the mandarin juice to help the thick mixture purée until very smooth. This can be done in a blender, container with an immersion blender, or a food processor.
In a large bowl, combine the nuts with the purée and stir until the nuts are evenly coated. Pour onto the parchment lined baking sheet and spread into an even single layer - make sure no nuts stay clumped together.
Place the tray on the middle rack of your oven for 20 to 30 minutes. Bake and the nuts begin to get fragrant and turn light golden. Open the oven and stir the nuts, then re-distribute, at the 15 minute mark. A shorter bake will produce a more orangey nut that will be a little softer and chewier (my favorite), a longer bake will produce a crunchier nut that will lose a little bit of the orange flavor.
