Pre heat oven to 375º F convection (400℉ for a standard oven). *See Note 1.
In a large roasting pan with a lid, heat the olive oil over medium-high heat and sauté your onion and garlic, stirring frequently.
1 large onion, ½ cup olive oil, 6 cloves of garlic
When the onion has just begun to soften, add the green beans to the pan. Stir well to coat the green beans in oil.
2 lbs green beans
Add the remaining ingredients. Stir well to combine.
1 15-ounce can tomato sauce, 1 6-ounce can tomato paste, 1½ cups water, 3 medium potatoes, 1 tbsp salt, ¾ tsp ground black pepper, 2 tbsp dried oregano
Cover the roasting pan, and place in the oven for approximately 1 hour.
Remove from the oven and stir. Return to oven for another 45-55 minutes or until green beans and potatoes are cooked to your liking.
Notes
Note 1 - Convection setting and Roasting Pan: This is a great dish to use the convection setting on because the dish is covered and won’t dry out easily. If you don’t have a lid for your roasting pan, simply cover it tightly with aluminum foil.