This simple dish is delicious and easily made. There are so many combinations you could use to eat on the side of this plate.
In a small skillet, sauté onion in oil until tender. Transfer to 1-qt. baking dish. Place fillet over onions. Sprinkle with salt and pepper. Top with tomato slices. Season with a little more salt. Combine butter and garlic; pour over tomato.
Bake, uncovered, at 350 degrees F for 14-18 minutes or until fish flakes easily with a fork.
I served the sole with a simple salad of greens, blueberries, raspberry vinegar, extra virgin olive oil, salt and pepper.