Preheat the oven to 400°F (200°C) and line a baking sheet with parchment paper.

In a mixing bowl, whisk together the whole wheat flour, baking powder, salt, garlic powder, and onion powder.

In another bowl, combine the Greek yogurt, beaten egg, and milk until smooth.

Add the wet ingredients to the dry ingredients and mix until just combined.

Fold in the shredded cheese, sausage (if using), and green onions.

Turn the dough out onto a floured surface and pat it into a circle about 1 inch thick.

Cut the dough into wedges and place them on the prepared baking sheet.

Bake for 20 minutes or until golden brown.

Allow the scones to cool slightly before serving. Enjoy warm or at room temperature.