In a microwave safe bowl, melt the butter in the microwave. Cut 2 thin slices from the lemon and squeeze the juice from the lemon into the butter.
Take a large piece of foil and put the vegetables in the middle. Place the fish on top. Brush both the vegetables and the fish. Generously salt and pepper both the fish and the vegetables.
Pull the sides of the foil up and fold together to make a tent. Fold in the sides of the foil in as well.
Cook for about 10 minutes or until the fish flakes. The thickness of your fish will determine your cooking time.
Notes
Cut the vegetables into even sized pieces so they will cook at the same time.You can also grill these!