This sauce has a flavor reminiscent of the sweet and sour sauces found in westernized Chinese cooking, but unlike those sauces, the “sour” in this sauce comes from the acid in the orange juice. The ketchup provides both color and a hint of spice. A tomato ketchup that is in reality a lightly seasoned tomato sauce is not appropriate in this application. Heinz ketchup from America and France works well. Heinz ketchup from England and Australia is a different ketchup recipe altogether./This sauce goes well with firm fish, such as tuna or swordfish, and crustaceans, such as prawns or lobster.
Heat oil in a small saucepan over medium heat. Add garlic and sweat without browning. Add orange juiceorange juice, honey, and ketchup. Mix well, bring to a boil, reduce heat, and reduce sauce slowly by half.
Just before serving, add basil and tomatoes. Finish with a couple of drops of walnut oiloil.