In a wok / frying pan, heat oils.
Slice the vegetables into thick slivers.
Lightly stir-fry peppers, garlic and ginger for 2-3 minutes.
Add spring onions and fish. Stir-fry, stirring gently at a medium high heat for 2-3 minutes more, adding soy sauce and black pepper.
Add liquid, blended with cornflour and stir into wok. As it simmers, it will quickly turn from a milky colour to clear.
Serve stir-fry on a bed of noodles on heated plates