Mash the avocado with a fork but leave it slightly chunky. Gently mix in the lemon juice, garlic salt, pepper and sour cream.
Divide the avocado between the two slices of bread. Slice the eggs in quarters and place four slices of egg per bread slice. Top with the smoked salmon and alfalfa sprouts. Serve.
Nutrition calculation is an estimation only. If you need nutritional calculations for medical reasons, please use a source that you trust.