Sauté onion for 1 minute then add garlic and cook for another 2 minutes or until golden. Add the rest of the ingredients and cook for about 4 minutes or until sauce thickens.
White sauce
In a pot soften spread and add flour, stir on a medium heat for 1 minute to cook out flour then add milk and salt, whisk to combine. Continue stirring for about 4 minutes or until sauce
thickens.
Seafood
Make a paste with anchovy, garlic, oil and salt then rub over seafood.