Whisk flour, sugar, baking powder, salt, and poppy seeds in a large bowl.
In a medium bowl, whisk yogurt, eggs, oil, zest, and vanilla.
Fold wet ingredients into dry until just combined.
Pour into pan and bake for 50–55 minutes until a toothpick comes out clean.
Cool completely on a rack.
Whisk powdered sugar and lemon juice; drizzle over the cooled loaf.
Notes
Use fresh lemons for the best zest and juice.Do not overmix the batter to keep the bread tender.Ensure the loaf is fully cool before glazing so it stays on top.Store in an airtight container to keep it moist for days.