Bring chicken broth and quinoa to a boil in a saucepan. Reduce heat to medium-low, cover, and simmer until quinoa is tender, 15 to 20 minutes.
Let quinoa chill, 8 hours or overnight.
Preheat the oven to 425 degrees F (220 degrees C). Grease a 9x13-inch glass casserole pan with coconut oil.
Heat olive oil in a pan over medium-high heat. Cook onion and garlic in the hot oil until onion starts to soften, about 5 minutes.
Mix onion and garlic in a large bowl with turkey, cooked quinoa, aminos, syrup, Sriracha, tomato paste, mustard, salt, and pepper and stir until it turns into a runny paste. Pour mixture evenly in the prepared pan and top with ketchup.
Bake in the preheated oven until no longer pink in the center, 30 to 40 minutes. An instant-read thermometer inserted into the center should read at least 165 degrees F (74 degrees C). Turn the oven off and let rest, 3 to 5 minutes. Remove, cut, and serve.