Green Beans with Tomatoes

• 1 tablespoon olive oil
• 1 medium onion, halved and thinly sliced
• 1/2 teaspoon dried oregano
• 1 can (14.5 ounces) whole peeled tomatoes in puree
• 1 pound green beans, trimmed
• Coarse salt and ground pepper

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In a large skillet with a tight-fitting lid, heat oil over medium-high. Add onion and oregano, and cook, stirring frequently, until lightly browned, 2 to 3 minutes.

To skillet, add tomatoes and their puree, breaking up tomatoes with a spoon or your fingers; stir to combine. Add green beans, 1 1/2 teaspoons salt, and 1/2 teaspoon pepper, and bring to a boil. Reduce heat to medium-low; cover and simmer, stirring occasionally, until green beans are soft, about 30 minutes. Serve.