Rice the cauliflower using a food processor or grater, and measure out 3 cups.
Microwave the riced cauliflower for 4 minutes, then let it cool. Squeeze out excess moisture using a clean kitchen towel.
In a large bowl, mix the cooled cauliflower, eggs, cheddar cheese, onion, garlic powder, salt, and pepper until well combined.
Heat olive oil in a large skillet over medium heat.
Scoop 1/4 cup of the cauliflower mixture into the skillet, and flatten with a spatula to form a hash brown shape.
Cook for 3-4 minutes on each side or until golden brown and crispy.
Transfer the hash browns to a plate lined with paper towels to drain any excess oil.
Serve warm and enjoy!