- Remove the large stems from spinach.
- Cook the bacon in the oil in a non-stick pan until crisp.
- Combine the spinach leaves, egg and onion in a salad bowl.
- Mix the cooked bacon along with its cooking fat with sour cream, mayonnaise, mustard and lemon juice.
- Add a little water if the mixture is too thick.
- Drizzle the dressing over the salad.
- Toss well.