Preheat oven to 180 degrees/ gas mark 4
Lightly spray a 9"x 9" pan with cooking spray. Set aside.
Cook spaghetti, drain and set aside.
In a large pan cook minced beef over medium-high heat until no longer pink.
Drain fat.
Return meat to pan.
Add taco seasoning and water.
Stir to combine.
Cook for 5 minutes.
Stir in soup, chopped chilli, chopped tomatoes and processed cheese.
Reduce heat and cook, stirring continuously, until cheese melts
Stir in cooked spaghetti.
Pour into pre-prepared dish.
Add chopped spring onions and cheese.
Bake for 30 minutes or until heated through.