Combine the two via folding, do not overmix. Your batter should be pourable and spreadable. If it is too dry, add a tbsp water and mix again. If it's too runny like pancake batter, add a tbsp more flour.
Fold in poppyseeds. Transfer to loaf pan.
Bake 35-40 minutes (20-25 for muffins) until knife comes out clean. Cool completely.
Whisk together the glaze, pour on the cooled loaf.
Slice and enjoy!
Notes
To make a flax egg, stir together 1 tbsp (7 g) flax seed meal and 3 tbsp water and let it sit and thicken for 5 minutes.