Heat oven to 400 degrees.
Rinse the Brussels sprouts and trim off their stem ends. Discard any brown leaves.
Dice the turkey strips.
Dice the onion into medium to large chunks. (optional)
Toss all veggies in a large bowl with olive oil and salt and pepper.
Pour veggies on to a large ungreased cookie sheet or baking pan.
Top with chopped turkey bacon.
Roast Brussels sprouts for 8 minutes. Open oven, remove pan and rotate Brussel sprouts using a spatula. Add the balsamic vinegar. Return to the oven and finish roasting for 8 additional minutes.
Serve hot.