1. Prepare a medium-hot fire in a charcoal grill with a cover, or pre-heat a gas grill to medium-high. For best results, use a non-stick grill which helps to avoid adding oil.
2. On the stove, heat 2 tsp olive oil in a non stick skillet. When oil is hot, place celery and green onion in pan. Season with salt and pepper. Cook until soft, about 8-10 minutes. Set aside to cool. We are going to add these to our burger mixture later.
3. In the same nonstick skillet, heat 2 tsp olive oil in . When oil is hot, place sliced onion in pan. Season with good pinch of salt and pepper and cook. Saute onions until browned and caramelized, about 15-20 minutes, stirring occasionally.
4. While onions are caramelizing, prepare basting sauce and Chipotle Sauce.
5. Combine Greek yogurt (or mayo) and Chipotle Tabasco in a small bowl and mix well. Cover and refrigerate until ready to use.
6. Combine barbecue sauce and mango chutney in small bowl and mix well. Cover and refrigerate until ready to use.

To make patties:

1. Combine ground turkey, Chipotle Tabasco, smoked paprika, low-fat cheese and cooked and cooled green onions and celery in a large bowl. Season with salt and pepper. Gently combine and mix using hands or large spoon. Form into 8 even sized patties, do this by scoring meat mixture in half, then quarters, then eighths.
2. Use a non-stick canola oil spray, to prevent patties from sticking to grill.  Spray patties directly with spray before placing on grill.
3. Place patties on grill rack, cover and cook until bottoms are browned, about 4-5 minutes. Using spatula, flip patties and cook additional 4-5 minutes. After flipping, use brush to baste turkey burgers with mango BBQ sauce. After cooking for 4-5 minutes, flip and baste other side.

To assemble burgers:

1. Spread chipotle sauce on both sides of open potato rolls. Place patty in bun and top with caramelized onions. Take a big bite and enjoy!
2. For those sauce lovers (like my hubby!), can be served with additional Mango BBQ sauce on side!