Preheat your oven to 375°F (190°C). While the oven is heating, line your baking tray with your tin foil then layer it with asparagus.
Set your salmon on top of the asparagus then start adding salt and pepper. Chop the fresh dill then peel off some lemon skins off of your lemon and apply them (along with the garlic) onto your salmon. Finish it all off by placing three cubes of butter.
When you're finished, fold up the foil until it covers up the entire salmon. Take the foiled salmon and bake it at 375°F (190°C) for 20 minutes.
When it's ready, open it up and serve immediately.