Spray a medium saucepan with cooking spray.

Sauté chopped green bell pepper and white onion in the saucepan until tender.

Set the cooked peppers and onions aside.

In a mixing bowl, combine ground turkey breast, egg, taco seasoning, sautéed peppers, and onions.

Mix thoroughly with your hands.

Form the mixture into four equal patties.

Grill the turkey patties until cooked through (internal temperature reaches 165°F).

Alternatively, cook the patties in a deep skillet on the stove.

When the patties are nearly cooked, place a slice of Monterey Jack pepper cheese on top of each patty.

Allow the cheese to melt.

While the burgers are cooking, prepare the guacamole.

In a medium mixing bowl, combine mashed avocados, garlic salt, diced Roma tomatoes, sliced black olives, crumbled feta cheese, and lemon juice.

Mix all ingredients together well.

Serve the cooked burgers on whole grain buns.

Top each burger with a generous scoop of the prepared guacamole.

Serve with tortilla chips on the side for any leftover guacamole.