Preheat oven to 350°F. Line a loaf pan with parchment paper.
In a large bowl, whisk together eggs, yogurt, olive oil, maple syrup, key lime juice, zest, and vanilla until smooth.
Fold in almond flour, oat flour, baking powder, and salt. Stir until just combined and smooth.
Pour batter into the prepared loaf pan. Bake for 38–42 minutes, or until golden on top and a toothpick comes out clean from the center.
Let loaf cool completely before glazing.
Whisk together powdered sugar and lime juice for the glaze. Pour over cooled loaf and top with extra zest.
Slice thick and serve with tea, iced coffee, or straight from the fridge.