In a small bowl, mix the softened butter, parsley, dill, lemon juice, garlic, lemon zest, salt, and pepper until well combined. This will be your herb butter.
Cut four pieces of heavy-duty aluminum foil, about 12 inches long. Lay a salmon fillet in the center of each piece of foil.
Use a spoon to spread about 1 tablespoon of the herb butter mixture over each salmon fillet, making sure to coat them evenly for maximum flavor.
Divide the asparagus and cherry tomatoes among the foil packets, placing them around the salmon. Drizzle a little olive oil over the vegetables and season with salt and pepper.
Place a couple of lemon slices on top of the salmon in each packet to enhance flavor during cooking.
Fold the aluminum foil over the salmon and vegetables to create a sealed packet. Make sure to pinch the edges tightly to prevent any steam from escaping.
Place the foil packets on a baking sheet and bake in the preheated oven for about 15-20 minutes, or until the salmon flakes easily with a fork and the vegetables are tender.
Carefully open the packets (watch for steam) and serve warm directly from the foil or transfer to a plate.
Notes
Make sure to pinch the foil tightly to keep the steam in for the best cooking results.
Keyword foil packets, healthy, herb butter, salmon