Chicken & Cheese pasta sauce

This recipe seems all wrong. There are too many ingredients, but they work together!
The combination seems wrong, but they work together!
A favourite for using up cooked chicken.

Ingredients
1 onion, sliced
2-3 cloves garlic, finely chopped
4oz cooked chicken, chopped
1 pint chicken stock
3oz sliced mushrooms
2oz sweetcorn
1 tbsp mixed herbs
1 heaped tsp mustard
1 tbsp plain flour
1 tsp brown sugar
dash Tabasco
dash lemon juice
Salt & pepper
2oz cheddar cheese, grated

Fry onions in a generous amount of oil. when they start to brown, add the garlic, mustard, and chicken. Fry for a few minutes. Add mushrooms and sweetcorn. Add flour, stir and continue to cook for 3-4 minutes. Add stock and bring to the boil. Add herbs, sugar, Tabasco, lemon juice, and salt and pepper to taste. Add cheese and cook for 5-10 minutes, thickening with flour as necessary. Spoon over pasta.