Preheat your oven to 375° F. Line or spray your muffin trays.
In a large bowl, whisk together the flour, baking powder, salt and sugar.
In a medium bowl, lightly beat your eggs. Then whisk in the milk and oil. Pour this mixture into the dry bowl and mix until JUST combined. Fold in the zucchini shreds, feta and mozzarella cheeses and chives.
Bake for 22-25 minutes or until golden and toothpick comes out clean. Allow to cool.
Zucchini shreds should come out to about 2 cups shredded. Do not squeeze them dry. We want them with their liquids.Oat flour can be subbed for the all purpose flour.Melted butter can be subbed for the olive oil, which gives them a more biscuity vibe.