Preheat your oven to 400°F and line a small square baking dish with parchment paper for easy removal.
In a medium mixing bowl, combine the ground chicken breast, almond flour, egg, nutritional yeast, garlic powder, dried rosemary, and sea salt.
Mix the ingredients thoroughly with a spatula until a uniform, slightly tacky dough forms.
Transfer the dough to the prepared baking dish and press it down evenly until it is approximately 1/2 inch thick.
Use your fingertips to press deep dimples into the surface of the dough, mimicking the classic texture of traditional focaccia bread.
Mince the fresh garlic cloves and strip the leaves from the rosemary sprig, then scatter them evenly over the top of the dough.
Drizzle the extra virgin olive oil across the surface, ensuring some of it pools slightly in the dimples for maximum flavor.
Bake for 18 to 22 minutes, or until the edges are deeply golden and the center feels springy to the touch.
Allow the focaccia to cool for 5 minutes before slicing into squares and serving warm.