Potato Tomato Gratin – Sunday Suppers
- Author: Rocky Mountain Woman
- 5 T extra virgin olive oil
- 6 cups thinly sliced onions
- 1 T fresh thyme leaves
- 1 T butter
- 1 1/4 cups thinly sliced potatoes
- 1/2 c heavy cream
- 2 1/4 cup sliced tomatoes
- 1/4 cup basil
- 1 t salt more or less
- few grinds from the pepper mill
- Season the tomatoes with salt and pepper, set aside
- Saute the onions, salt and pepper on medium low heat in 4 T olive oil until the onions are deep brown, about 30 minutes
- Toss the potatoes with the thyme and cream
- Layer the onions, potatoes and tomatoes in a gratin pan and then repeat
- Pour the remaining cream from the potatoes and a little olive oil on top
- Cover the grain dish tightly with foil
- Bake two hours at at 350 degrees
- Turn the oven up to 450 degrees and remove foil
- Bake until top is golden brown, about 30 minutes