Preheat a convection or conventional oven to 400°F (200°C) and thoroughly grease a 24-count mini-muffin tin with non-stick cooking spray.
Place thawed hash browns in a clean kitchen towel and squeeze firmly to remove all excess moisture to ensure maximum crispness.
In a large bowl, combine the dried hash browns, cooked sausage crumbles, shredded cheese, beaten eggs, salt, pepper, and garlic powder.
Incorporate the mixture manually until the egg is evenly distributed as a binding agent.
Distribute the mixture evenly among the muffin cups, pressing down firmly with the back of a spoon to compact the ingredients.
Bake for 20 to 25 minutes, or until the internal temperature reaches 165°F (74°C) and the exterior surface is golden brown and crispy.
Rest the bites in the pan for 5 minutes to allow the structure to set before extracting with an offset spatula.