1.In A Bowl, Mix Together The Tomatoes, The 1/3 Cup Chopped Onion, 2 Of The 4 Cloves Of Minced Garlic, Serrano Chile Pepper, Lime Juice, And Cilantro. Stir In Salt And Pepper To Taste, And Set Aside. 2.Place The Ground Turkey In A Bowl. Add The Egg, The 1/2 Onion, Minced, Remaining 2 Cloves Minced Garlic, Coriander, Celery Salt, Chili Powder, Cumin, And Chopped Parsley. Using Your Hands, Work The Mixture Until All Ingredients Are Evenly Blended. Form Mixture Into 4 Patties. 3.Heat A Large, Non-Stick Skillet For Medium-High Heat. Cook The Turkey Burgers For 5 Minutes Per Side, Or Until No Longer Pink In The Center And Juices Run Clear. Reduce The Heat As Necessary During Cooking. Serve With Pico De Gallo Salsa.