Preheat a chargrill pan over high heat. Combine asparagus and 1/2 tablespoon of oil in a bowl. Season, then cook the asparagus, turning 4 times, for 8 minutes or until charred.
Meanwhile, squeeze sausage meat from casings. Heat remaining 2 tablespoons of oil in a frying pan over medium high heat. Add sausage meat and cook, breaking up the meat with a wooden spoon, for 5 minutes or until golden.
Using a slotted spoon, transfer meat to a bowl. Add onion and potatoes to pan and cook, stirring, for 8 minutes or until soft and golden. Return meat to pan, add paprika and cook, stirring, for 30 seconds.
Whisk 3 eggs in a small bowl. Season. Heat half the butter in an 18cm non-stick frying pan over medium heat until butter starts to foam. Add eggs, then reduce heat to low. Cook, without stirring, for 1 minute or until edge starts to set. Using a spatula, pull cooked edge towards centre of pan, allowing uncooked eggs to coat base and edge of pan. Cook for a further 2 minutes, then slide onto plate. Repeat with remaining butter and eggs.
Top omelets with half of the potato mixture and asparagus, and a spoonful of sour cream. Dust with extra paprika and serve immediately.
