Mix flour, sugars, nutmeg, salt in a bowl. Mix in olive oil
Remove 1/2 c for crumb topping, mix in cinnamon powder, set aside
In another bowl, mix cinnamon and soda, add in egg, and pour in buttermilk
Pour this mixture onto dry mixture, mix to just combine
Pour onto muffin pan, top with crumb topping
Bake until skewer inserted comes out clean, at preheated 375 F, 30-40 mins