Hashbrown Avocado Eggs Benedict

Name: Hashbrown Avocado Eggs Benedict
Prep time: 30 min
Cook time: 30 min
Total time: 1 h
Cuisine: American
Ingredients: 0.5 lbs potatoes; 1 tbsp all-purpose flour; 1 egg white; salt and pepper (to taste); 3 egg yolks; 1 tbsp unsalted butter; 1 tbsp lemon juice; 1/4 tsp salt; 5 tbsp milk; canola oil (for frying); cayenne pepper (to taste, optional); 2 fresh whole eggs; 1 tsp salt; 1 tsp white vinegar; 1/2 red onion (cut into strips); 1 small avocado (cut into strips)