Easy homemade sweet and sour sauce

oil

onion, (diced)

bell peppers, (diced (I used red, yellow and green))

medium mushrooms, (sliced)

(~ 1 cup) frozen edamame (soy beans)

tin bamboo shoots, (drained (120g, or ~ 1 cup, when drained) (optional))

(~ 1 cup) pineapple chunks (I used tinned)

(~ 1/2 cup) tomato ketchup

(~ 1/2 cup) pineapple juice (I used the juice from a tin of pineapple chunks)

white wine vinegar

soy sauce

honey ((or agave nectar))