Peel, core and slice the pineapple into rounds.
Heat a griddle pan to quite a high heat.
When hot enough, drizzle with oil and place the pineapple slices onto the pan, cooking until you have a nice caramelisation and you can see the griddle marks. Do this on both sides. Remove the pineapple from the heat, sprinkle with a few salt flakes and allow to cool. Dice the pineapple.
Shred the cabbage, capsicum and onion either using a mandoline or knife. Alternatively, you can place them all into the Thermomix bowl and chop 3 seconds/speed 5.
Toss with the remaining ingredients, including the pineapple.