When it comes time to cook the chicken, you can either cook it by grilling it or roasting it (or use your favorite method).
To grill, preheat the grill to medium-high. Remove the chicken from the marinade and grill for 5-6 minutes a side, or until done.
To roast it, remove the chicken from the marinade and put into a baking dish or on a baking pan lined with parchment paper. Put into the oven and set the timer for 15 minutes.
Once the timer goes off, check to make sure the chicken is done either with a meat thermometer - it should be 165 F, or by slicing a breast open and making sure it's no longer pink inside. If it isn’t, continue to cook until it is.
Once it’s done, remove it from the oven and cover with aluminum foil or a kitchen towel for 5 minutes to rest.
While the chicken is cooking, make the Blueberry Vinaigrette by blending all of the ingredients in a blender or food processor until smooth.
Assemble the salad by placing a layer of greens on each plate or meal prep container, then adding sliced chicken, sliced cucumber, avocado, and blueberries. Drizzle with the vinaigrette (though if storing in a meal prep container it's best to wait until right before serving to put the dressing on).