In a small skillet over medium heat melt butter. Add pecans, sugar and salt. Stir until pecans are well coated. Stir until the sugar caramelizes, about 3-5 minutes. Spread onto silpat or parchment paper. Separate pecans. Allow to cool. Meanwhile: in a pint size mason jar combine dressing ingredients. Seal and shake until well combined. Set aside on the counter. In a large bowl combine the spinach, onions, strawberries and blueberries. Pour about 1/2 of dressing over salad, and toss. Top with avocado, cheese and candied nuts. Serve remaining dressing on the side. Refrigerate for 15 minutes before serving (or serve immediately). Serve with the remaining dressing on the side. Enjoy!