Prep all your ingredients: Cut the cherry tomatoes in half, peel and cut the potato in 1/2 inch thick rings, chop the parsley and cut the garlic cloves in half. Set aside.
To a Saute pan, add a drizzle of olive oil, then add the sliced potatoes and seasoned with salt and pepper.
On top of the potatoes place your fish and season with salt and pepper.
Then add the garlic, tomatoes and parsley on top of the fish. Season with salt and pepper.
At this point, you can either add water or white wine or a combination of both. Do not pour the liquid directly on top of the fish and other ingredients. Pour around the edges as to not wash away the seasoning.
Then drizzle everything with olive oil. Place the cover on tight on medium heat until it comes to a simmer and then vent it. Allow it to simmer until the fish is cooked through about 5 to 8 minutes. The potatoes will cook at the same rate as the fish because they are thinly sliced but before turning off the heat, check the potatoes with a fork to make sure they are tender.