Place the chopped cauliflower in a large mixing bowl. Using the large holes on a box grater, grate the zucchini. Place in a clean tea towel and squeeze out as much liquid as possible. Add to the cauliflower. Grate the onion into the bowl. Add the goat cheese, almond flour, egg, chives, salt, and pepper. Mix well.
Heat about a tablespoon of oil in a large skillet over medium heat. Add ½ cup of the mixture to the pan per fritter and flatten into patties. Cook for about 5 minutes or until golden brown on the bottom. Flip and continue to cook until browned on the other side and the fritters feel firm to the touch. You will need to fry the fritters in batches. Add more oil to the pan in between batches, if needed.
Serve topped with poached eggs and sriracha, if desired