01 -
Lightly grease the interior of the slow cooker with non-stick spray or butter to prevent sticking.
02 -
In a skillet over medium heat, sauté the sliced mushrooms for 3 to 5 minutes until softened. Remove from heat and set aside.
03 -
Place half of the frozen hash browns in an even layer at the bottom of the slow cooker. Top with half the sausage or bacon, diced onion, bell pepper, sautéed mushrooms, and shredded cheese. Repeat layers with remaining hash browns, meat, onion, bell pepper, mushrooms, and cheese.
04 -
In a large mixing bowl, whisk eggs, milk, garlic powder, paprika, black pepper, and salt until fully combined.
05 -
Pour egg mixture evenly over all the layered ingredients in the slow cooker, ensuring thorough coverage.
06 -
Cover and cook on low for 7 to 8 hours or high for 3 to 4 hours, until eggs are set and the casserole is firm.
07 -
Allow casserole to rest briefly. Slice, then garnish with fresh parsley or green onions if desired. Serve hot.