Marinate the chicken: Place the chicken breasts in a large bowl and add the marinade ingredients. Toss to coat and refrigerate for at least 30 minutes, or up to overnight.
Prepare the chicken glaze: In a small saucepan, combine the chicken glaze ingredients and bring to a simmer. Cook until thickened, about 5 minutes. Let the glaze cool slightly before applying to the chicken.
Grill the chicken: Preheat your grill to medium-high heat. Remove the chicken from the marinade and grill for 5-7 minutes per side, or until cooked through and slightly charred. During the last 2 minutes of grilling, brush the chicken with the cooled glaze.
Dice and glaze the chicken: Let the grilled chicken rest for a few minutes, then slice it into thin strips. Toss the sliced chicken in an additional batch of the chicken glaze to coat evenly.
Make the mandarin orange slaw dressing: In a blender, combine the lime juice, orange juice, sugar, rice vinegar, and olive oil. Whisk to combine.
Make the mandarin orange slaw: In a large bowl, combine the mandarin oranges, purple cabbage, carrots, green onion, cilantro, bell peppers, and sesame seeds. Pour the slaw dressing over the slaw and toss to coat.
Make the jalapeno crema: In a small bowl, combine the sour cream, jalapeno peppers, lime juice, honey, salt, cilantro, and mashed avocado. Stir until well combined.
Assemble the tacos: Warm the corn tortillas on a griddle or skillet. Place the sliced chicken on the tortillas and top with the mandarin orange slaw and jalapeno crema. Serve immediately.
Assemble the tacos: Warm the corn tortillas on a griddle or skillet. Place the sliced chicken on the tortillas and top with the mandarin orange slaw and jalapeno crema. Serve immediately.