In a bowl, toss together the lima beans, red onion, garlic, olive oil, balsamic vinegar, salt, and pepper to coat.
Spread the mixture evenly on the baking sheet.
Bake for 20 to 25 minutes, or until the lima beans are tender and the onions are translucent and beginning to brown.
Notes / Tips / Wine Advice:
Serving Tip:These roasted lima beans are delicious on their own or as a side dish with roasted meats or a grain salad.Wine Advice:A light red wine such as Pinot Noir works well with the earthy flavors of the lima beans and the tangy balsamic vinegar.