Whisk the egg and broth together and add to the flour. Blend in oats and garlic powder. Form the dough into a ball.
On a floured work surface, roll dough out to 1/2-inch thickness. Cut out "donuts" and arrange on a shallow baking dish in a single layer. (Repeat cooking process as space requires, do not crowd the "donuts".)
Microwave on HIGH for 10 minutes. Cool on wire rack.