Heat oil over large skillet over medium-high. Add onion and bell pepper and sauté until softened, about five minutes. Add in garlic and stir for another minute or two.
Stir in tomato paste, chili powder and salt. Add ground turkey, breaking up with a wooden spoon until cooked through.
Meanwhile, preheat oven to 325ºF. Lay the taco shells out as directed on the box and pre-bake for 6-7 mins (or as directed on box).
When shells are done, pull out of oven and let cool for a few minutes. Turn oven heat up to 350ºF.
Arrange taco shells on baking sheet and fill the bottom of the shells with refried beans. Then add cooked taco meat. Now layer the veggies on: tomatoes, cilantro and green onions and top with cheese.
Bake in preheated oven for 10 minutes or until heated through and cheese is melted. Serve with any extra toppings, such as salsa. Enjoy!