Place spinach in a large heat safe bowl. Toss with red onion.
In a large skillet, cook bacon over medium high heat until crisp. Crumble bacon. Reserve 1 ½ tsp drippings.
In a small sauce pan, melt jam over medium heat. Stir in balsamic vinegar and bacon drippings. Bring to a boil Boil 1 minute. Stir in basil. Season with salt and pepper to taste.
Pour hot dressing over spinach in bowl. Toss to wilt spinach and disperse the dressing. Toss strawberries and spinach mixture. Plate salad on to 6 small plates. Sprinkle crumbled bacon over top of each salad. Serve immediately.