Heat oil in a heavy pan and sauté the zucchini for 3 minutes on high heat
Add the scallions and mushrooms and tomatoes and sauté until the mushroom start to brown (about 4-5 minutes)
Add the peach balsamic vinegar
Set vegetables aside
DO NOT wipe out the pan
Add another splash of olive oil and add the dill and the lemon, face down. Season the bass with salt and pepper and sear for about 3 minutes per side. If desired, add a little more vinegar to taste. Spoon over fish
Plate the fish and surround with vegetables. Top with fresh dill