In a medium bowl, whisk together the flour, baking powder and salt. Set aside.

In a large bowl with an electric mixer or the bowl of a stand mixer fitted with the paddle attachment, add the sugar and orange zest. Mix together on low speed for about 1 minute, until sugar becomes slightly moistened with the orange zest.

Add the eggs, one at a time, beating well after each addition. Add the oil and vanilla and mix to combine. Add the flour mixture alternately with the yogurt, adding 1/2 the flour mixture first, then all the yogurt, and then the remaining flour. Add the orange juice and poppy seeds and mix to combine.

Spoon batter into the prepared loaf pan and smooth top.

Bake in preheated oven for 45-55 minutes, or until a tester inserted in the centre comes out clean.

Remove loaf pan to a cooling rack. Using a long skewer, poke holes into the loaf, then brush top with 3 Tbsp orange juice. Let loaf sit in pan for 15 minutes, then run a knife around the outside and remove the loaf to a cooling rack to cool completely.

Once cooled, prepare the glaze by combining the ingredients and mixing together until smooth. If necessary, add a bit more icing sugar or orange juice to thicken or thin the glaze as needed. The glaze should be thin enough to drip of the loaf, but not so thin it runs right off the loaf. Spoon glaze over cooled loaf and let stand until it sets.