Soften the cranberries: In a microwave-safe bowl, stir together the cranberries, 2 Tbsp orange juice and sweetener. Microwave in 1-minute increments, stirring between each, until some cranberries burst, about 2 minutes total. Cool for 10 minutes or refrigerate until cold.
Toast the pecans: Bake on a sheet pan at 350°F for 6–8 minutes, or toast in a dry skillet over medium heat for 3–5 minutes, stirring often, until fragrant. Cool.
Make the dressing: Whisk together the olive oil, balsamic vinegar, orange juice, zest, honey, garlic, salt and pepper.
Assemble: Add the greens to a large bowl or platter. Top with the oranges, green onions, celery, cooled cranberries, pecans and goat cheese. Refrigerate until ready to serve.
Serve: Toss with the dressing just before serving, or serve the dressing on the side.