Rating: 4.5 stars
28 Ratings
  • 5 star values: 21
  • 4 star values: 3
  • 3 star values: 2
  • 2 star values: 1
  • 1 star values: 1

We updated this favorite side dish casserole recipe with fresh onion and baby portobello mushrooms. Make ahead to save time.

Source: Better Homes and Gardens

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Recipe Summary

prep:
50 mins
bake:
35 mins
stand:
30 mins
total:
1 hr 55 mins
Servings:
10
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Ingredients

Ingredient Checklist

Directions

Instructions Checklist
  • In a large skillet cook onions, covered, in hot oil over medium-low heat for 13 to 15 minutes or until onions are tender. Uncover; add brown sugar. Cook and stir over medium-high heat for 3 to 5 minutes or until onions are golden and caramelized. Cool slightly; transfer to a storage container. Cover and chill up to 24 hours.

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  • In a Dutch oven cook green beans, covered, in a small amount of boiling water for 4 minutes. Drain. In a 3-quart au gratin or baking dish combine green beans and mushrooms. Cool slightly; cover and chill up to 24 hours.

  • Let onions and bean mixture sit at room temperature for 30 minutes. Combine olive oil, soy sauce, and balsamic vinegar. Pour over vegetables, tossing to coat. Preheat oven to 400 degrees F. Roast beans, uncovered, for 30 minutes, stirring once until crisp tender. Meanwhile, in a medium mixing bowl beat together cheese and milk with an electric mixer on medium speed.

  • Spoon cheese in lengthwise mounds along center of baking dish. Top with caramelized onions. Return to oven; heat 5 to 8 minutes or until cheese and onions are heated through.

To serve right away:

Chilling step may be omitted. Roast beans only 15 to 20 minutes until crisp tender; add cheese and onions as in step 4.

Nutrition Facts

173 calories; fat 12g; cholesterol 8mg; saturated fat 4g; carbohydrates 12g; mono fat 5g; poly fat 3g; insoluble fiber 3g; sugars 7g; protein 6g; vitamin a 485.9IU; vitamin c 10.6mg; thiamin 0.1mg; riboflavin 0.2mg; niacin equivalents 1.2mg; vitamin b6 0.1mg; folate 20.2mcg; sodium 163mg; potassium 257mg; calcium 60.6mg; iron 1.4mg.
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