Step 1: Toast Walnuts - Heat a dry skillet over medium heat for 2 minutes. Add walnuts and toast for 5 minutes until fragrant and lightly browned. Transfer to a plate to cool.

Step 2: Prepare Dressing - In a blender, combine olive oil, apple cider vinegar, blueberries, monk fruit powder, salt, pepper, and lemon juice. Blend on high for 30-45 seconds until smooth.

Step 3: Assemble Salad - In a large bowl, place spring mix as the base. Scatter toasted walnuts, remaining blueberries, and crumbled goat cheese over the greens.

Step 4: Dress Salad - Pour dressing over salad right before serving, toss gently to coat without sogginess.