"Soybean oil, water, whole eggs and egg yolks, vinegar, salt, sugar, lemon juice, natural flavors"
Compare to a recipe (http://www.theguardian.com/lifeandstyle/wordofmouth/2010/jul...)
2 egg yolks
Generous pinch of salt
250ml groundnut or sunflower oil
25ml extra virgin olive, walnut or rapeseed oil
1 tbsp mustard of your choice (or 1tsp mustard powder)
1 clove garlic, crushed (optional)
1 tbsp white wine vinegar or lemon juice
The mustard, olive oil, presumably more egg yolk and mustard must contribute to the colour.