Preheat oven to 350°F.
Prepare 9x4 loaf pan. Spray pan with non-stick cooking spray and/or line with parchment paper.
In a large bowl, combine flour, baking powder and salt.
In a medium bowl, combine oil, sugar, sour cream, lemon juice, lemon zest, eggs and vanilla extract. Whisk until fully mixed.
With a spatula, fold the wet ingredients into the dry ingredients. Do not overmix. A little bit of the dry mix should still be visible when it is mixed.
Pour batter into the prepared pan.
Bake for 45-55 minutes or until a toothpick is inserted and comes out with crumbs on it.
Remove from oven, let cool for 10 minutes in the pan. Remove to a cooling rack.
Mix powdered sugar and 2 tablespoons of lemon juice to make the glaze.
Once bread is completely cool drizzle the top with your glaze.
Serve.