Spray the bottom of your slow cooker with non-stick cooking spray and evenly space chicken breasts out on the bottom.
Pour vinegar, honey, garlic, and cornstarch over top of chicken.
Add in the red onion and pepper, cover, and set to high for 4 hours (or place on a low setting to cook for 6-8 hours).
After chicken has been thoroughly cooked, use a fork to shred evenly.
On a large plate, spread ½ cup of spinach leaves evenly over the Flatout ProteinUp wrap. Top with 1 ½ tablespoons of feta cheese and 1 tablespoon of walnuts.
Sprinkle ¼ cup sliced strawberries over top of spinach. Then top with the shredded chicken and vegetable mixture.
Roll into a wrap and repeat with the remaining wraps. Serve warm.