In medium sized pot, heat (medium) oil and garlic for 2 minutes.
Add ground turkey and place lid to allow the meat to heat through for 2-3 minutes. With a slivered wooden spoon, break meat up into very small pieces. Once the meat is mostly cooked, add parsley, salt, pepper, red pepper flakes, and all three vegetables and let cook for another 3-4 minutes. Add tomato paste and the juice of one lemon. Mix well until all the meat and vegetables are covered with the tomato paste, cover with lid on low heat until vegetables are softened, about 7-10 minutes.
Serve on toasted/grilled hamburger bun and cheese of choice.