Sauté the onion and garlic in the oil in a large saucepan over medium heat. Season with some salt in pepper. Add the turkey mince and cook through.
Add the spice mix and cook for a minute or so until fragrant. Add in the chipotle, tomatoes and maple syrup and stir to combine. Simmer for 25–30 minutes or until thickened. Taste and adjust seasoning as required. Add the black beans and cook for a further 5 minutes to heat through.
Prepare the cabbage slaw by combining the shredded cabbages, carrot, coriander and chilli in a bowl.
To make the dressing, whisk together the mayonnaise, lime juice and zest, and season with salt and pepper. The dressing should be pouring consistency. If too thick, thin with a little warm water. Toss the cabbage slaw with just enough of the dressing to coat everything evenly.
To serve, take a warm tortilla and place it on a serving plate. Add a layer of slaw, followed by a spoonful or two of spiced turkey mix, then another light layer of slaw. Finish with a sprinkle of toasted macadamias (finely chopped) for flavour and texture along with a wedge of lime. Alternatively, place a bowl of chilli in the centre of the table along with a bowl of slaw, a stack of warm tortillas, and the macadamias and lime wedges. This way your guests can build their taco just the way they like it.