Preheat oven to 350° Fahrenheit and line a metal loaf pan with parchment paper.
Add all of the dry ingredients to a large mixing bowl and whisk.
Make a hole in the center and add the wet ingredients. Whisk the eggs into the rest of the wet ingredients. Then, use a spoon to combine all of the ingredients until a batter forms.
Pour the batter into the lined loaf pan and smooth out with the back of the spoon.
Use the same bowl (no need to rinse) to make the crumble topping. Combine all of the crumble ingredients with a fork. Crumble over the top of the loaf.
Transfer loaf pan to oven and bake for about 60 minutes, until a knife comes out clean.
Once done, let cool for at least 10 minutes and then slice and serve!