Preheat oven to 400°F. Spray a 24-cup muffin tin with cooking spray.
In a bowl, mix 1 egg with hash browns, olive oil, 1 cup cheese, half the salt and pepper.
Divide mixture among muffin cups and press down to form crusts. Sprinkle with parsley.
Bake 10–15 minutes until crust is crispy.
Meanwhile, cook bacon until crisp, then crumble.
In a large bowl, whisk remaining 8 eggs.
Add remaining cheese, salt, pepper, bacon, bell peppers, and milk.
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