Nutrition per serving may change if servings are adjusted.
1 tablespoon extra-virgin olive oil
3 medium red onions, (about 1 3/4 pounds), cut into 16 wedges each
1 pound green beans, trimmed
1/2 cup vegetable broth
1 tablespoon balsamic vinegar
2 teaspoons light brown sugar
1/4 teaspoon salt
Freshly ground pepper, to taste
Heat oil in a large skillet over medium heat. Add onions and cook, stirring occasionally, until golden, 10 to 15 minutes.
Meanwhile, bring a large saucepan of lightly salted water to a boil. Add green beans and cook, uncovered, until crisp-tender, 6 to 7 minutes. Drain.
Add broth to the onions; cook for 5 minutes. Stir in vinegar, brown sugar, salt and pepper. Add the beans, cover and cook for 2 minutes. Serve warm.
Make Ahead Tip: Prepare through step 2. Cover and refrigerate onions for up to 2 days. Refresh beans under cold running water; cover and refrigerate for up to 2 days.
Commercial vegetable broth is readily available in natural-foods stores and many supermarkets. We especially like the Imagine and Pacific brands, sold in convenient aseptic packages that allow you to use small amounts and keep the rest refrigerated.