For the Cake:
Preheat your oven to 360° F. Grease a loaf pan with your oil of choice.
Combine the Hungry Harry's Yellow Cake mix, egg or egg replacer, milk, oil, and lemon zest. Mix until completely combined. Bake until a skewer or knife inserted in the middle comes out clean, 20-25 minutes.
Cool before pouring the glaze over the top.
For the Glaze:
Combine the oil, powdered sugar, and lemon juice in a small sauce pot. Bring to a boil, whisking until the sugar is completely dissolved. Add the tea bags, and steep until glaze is completely cool. Remove and discard tea bags before glazing the cake.
Note: We like to garnish this cake with candied lemon slices: just slice lemons as thinly as possible and simmer in a mixture of 1 part sugar to 1 part water, until the rind is tender.