Place salmon filet on a baking sheet and brush it with a few coats of balsamic vinegar. Reserve the rest of the balsamic for later. Season salmon with a dash of salt and pepper.
Bake salmon for 15-20 minutes until cooked through.
While salmon cooks, make the salsa. Combine strawberries, cilantro, jalapeño, green onion, lime juice in a medium bowl and stir to combine. Add salt and pepper to taste. Store salsa in the fridge until you're ready to serve.
When salmon is cooked, brush a bit of the remaining balsamic vinegar over the top. Top salmon with strawberry salsa and serve immediately.
Cooking time may vary depending on the size/shape of your filet and the level of doneness you like - I like my salmon not quite well done. Start checking your salmon around the 10 minute mark if you're worried about cook time.