Preheat oven to 375°F (190°C). If making rolls, line a baking sheet with parchment paper. If making a loaf, grease and flour (with almond flour) a small loaf pan or muffin tins.
In a medium bowl, whisk together the Greek yogurt, eggs, and olive oil (if using) until smooth and well combined.
In a separate, larger bowl, whisk together the almond flour, baking powder, salt, and any optional garlic or onion powder you're using. Make sure the baking powder and salt are evenly distributed.
Pour the wet ingredients into the bowl with the dry ingredients. Using a spatula or wooden spoon, mix everything together until it forms a cohesive dough. Don't overmix; mix just until no dry streaks remain.
The dough will be soft and a little sticky. If making rolls, scoop or spoon portions (about 6-8 small rolls) onto your prepared baking sheet. You can gently shape them into rounds with lightly wet hands if you like. If making a loaf, spoon the dough into your prepared loaf pan and smooth the top.
Pop the baking sheet or loaf pan into your preheated oven. Bake the rolls for about 25-30 minutes, or the loaf for 30-35 minutes, or until they are golden brown on top and cooked through. A toothpick inserted should come out clean (internal temperature should reach about 200°F/93°C).
Let the bread or rolls cool on the baking sheet or in the pan for a few minutes before transferring them to a wire rack to cool completely. Or, enjoy warm!