Preheat your oven to 350℉ and prep a standard loaf pan by greasing it with non-stick spray, butter, or ghee and lining it with parchment paper.
In a large mixing bowl whisk together the 2 eggs and 1 cup granulated sugar.
To the mixing bowl add the 1 cup greek yogurt, 1 ½ vanilla extract, and ½ cup canola oil.
To the wet mixture, add the 2 cups all purpose flour, 1 ½ teaspoon baking powder, ½ teaspoon cinnamon, and 1 teaspoon kosher salt. Whisk until just combined.
Make the cinnamon sugar mixture: In a separate small bowl combine the ½ cup granulated sugar and 1 tablespoon cinnamon.
To a prepared loaf pan (lined, greased), pour half of the batter and spread into an even layer. Then sprinkle ¾ of the cinnamon sugar on top. Using a knife or offset spatula, gently swirl the cinnamon sugar filling into the bottom layer of batter without fully mixing them together. Top with the remaining batter and sprinkle the remaining cinnamon mixture over top.
Make the streusel: Combine the 3 tablespoon melted butter, 2 tablespoon light brown sugar, 2 tablespoon granulated sugar, ¼ cup flour, ¼ teaspoon cinnamon, and ¼ teaspoon kosher salt. Sprinkle in an even layer over the top of the loaf.
Bake at for 50-60 minutes until deeply golden. Baking time may vary depending on your oven.