Pour broth into a small bowl and sprinkle unflavored gelatin. Allow it to soften for at least 5 minutes.
Take ½ cup of the ground turkey and put it back into the food processor. Add softened gelatin, salsa, psyllium powder, and garlic.. Process for 2 minutes. Scrape the sides of the food processor as necessary. Then drizzle oil into the food processor as it is running. Continue processing for 10 seconds.
Empty mixture back into large bowl with the rest of the ground turkey and mix until it is uniformly mixed.
Divide into 8 even balls. Pat them into ¾″ patties. Season with salt and pepper
Pan fry 4 burgers with 1 cup of sautéed onions at medium low heat. The burgers will seep out gelatin at first. Don't even try to flip for 8 minutes or the burger will fall apart. Cook until browned on both sides.
Notes
The recipe directions are for full-size burgers but I usually make much smaller burgers for myself. I use a #24 disher and make slider-sized burgers. I get 8 sliders per pound. To make the meatballs, I use a #50 disher and get 24 meatballs per pound.
You can use the same recipe to make turkey meatballs but the cooking process is a little different. The raw meatballs are a little too tender for the pan, so I baked them in the oven at 350° for 15 minutes. Then finish them in the pan surrounded by all those caramelizing onions.
You may need to compensate for the wetness of the salsa with some additional binder, like oat flour. Each salsa is different, you'll need to test it out for yourself if you have difficulty getting the burgers to stay together.
Recipe by Creating Silver Linings at https://www.creatingsilverlinings.com/caramelized-turkey-burger/