Return the pan to the same heat and add one table spoon of oil, 1/8 tsp of chili flake and 1 tsp of fennel seed, garlic, and orange skin. Fry for 1 min then add tomatoes, stock half tsp of salt and plenty of pepper. Cook until boiling, then add the fried orzo. Put the cover on, then lower the heat to medium low to simmer for 15 mins