In a skillet, break up hash brown and cook in oil on medium to low heat. You might need to add a dash of water to the pan. Meanwhile, dice up chorizo and slice scallion. Add to pan and stir to combine as hash brown starts to thaw.
Make your avocado mash by combine avocado, lemon juice, red pepper flakes, olive oil, salt and pepper to a bowl. Use a fork to combine until smooth.
Slice bagel and scoop out (if you want). Add Swiss cheese and bake until cheese is melted.
Meanwhile, as hash browns start to crisp up and chorizo is close to being done cooking, crack 1-2 eggs (depending on preference) on top. Cover with a lid and cook on medium to low until egg is done.
Add avocado mash to bagel and then top with hash browns and eggs. Serve with hot sauce and/or ketchup or however you like your breakfast sandwich