Pre-heat oven to 350 degrees F.Combine the flax meal and water and set aside 5-10 min to make the flax egg.Mix together melted coconut oil, applesauce, milk, and honey. Add in flax egg once ready.One at a time, mix in oats, almond meal, gluten-free flour, baking powder, soda, and salt.Add lemon zest, juice, and poppy seeds. Mix well.Pour into baking pan lined with parchment paper or sprayed with cooking spray.Bake 45 minutes, until top is slightly browned and knife comes out clean.Let cool 20 minutes. Combine powdered sugar and lemon juice for glaze and pour over once cool.