Puree the onion sauce in a food processor or with a stick blender.
The Sun
For the onion sauce, sauté the onion in butter till soft and slightly caramelised.
Times, Sunday Times
Combine with the onion sauce and drizzle with olive oil.
Times, Sunday Times
Smoked haddock gnocchi with creamy lemon and spring onion sauce.
The Sun
I loved the split-pea soup and the blackened chicken, served with cajun spices, mash and a fine apple and onion sauce.
Times, Sunday Times