Put balsamic vinegar, apple cider vinegar, strawberry jam, extra-virgin olive oil, Dijon mustard and black pepper in a bowl, whisk together and keep aside

Microwave the walnuts for 30 seconds OR dry-roast 1-2 minutes to enhance the flavor

Quarter the strawberries

Put strawberries, baby spinach, walnuts and dressing into a bowl and toss

Divide evenly into 4 plates and serve immediately