Preheat your oven to 350F. Place almond flour, baking soda and salt in a medium bowl and mix. In a separate bowl, add eggs, honey, apple cider vinegar and butter and whisk until well combined. Add the liquid to the dry ingredients and stir until combined. Spread batter evenly in a well-greased 8-9 inch pie plate or a 2.75 quart casserole dish. Bake for 25 minutes, or until a knife comes out clean.