1 large red onion, halved and thinly sliced

1/2 tsp. freshly ground pepper, divided

1/4 tsp. salt, divided

1/3 C. 1% milk

1/2 C. plain dry breadcrumbs

4 portobello mushroom caps, 3-4 inches in diameter

3 cloves garlic, minced

1 pound spinach, tough stems removed

1 15-ounce can white beans, rinsed

3/4 C. vegetable broth

1/2 C. grated Manchego, Gruyere or Parmesan cheese

 

Heat 1 T. oil in a medium nonstick skillet over medium heat. Add onion and cook, stirring occasionally, until brown, 8 to 10 minutes. Reduce heat to very low, season with 1/4 tsp. pepper and 1/8 tsp. salt. Continue cooking, stirring occasionally, until caramelized, about 15 minutes Transfer to a bowl and keep warm. Meanwhile, place milk in a small bowl and place breadcrumbs on a large plate. Dip each mushroom cap in milk, then dredge in the breadcrumbs. Heat 1 T. oil in a large nonstick skillet over medium heat. Add mushrooms, gill-side down. Place a heavy, heatproof plate or pie pan on top of the mushrooms and cook until golden brown, pressing down on the plate periodically to flatten them, about 6 minutes. Carefully remove the plate using an oven mitt or tongs, add 1 T. oil to the pan and turn the mushrooms over. Replace the plate and cook, pressing the plate once or twice, until the mushrooms are golden brown and cooked through, 5 to 6 minutes more. Remove from heat; cover to keep warm. Heat the remaining 1 T. oil in a Dutch oven over medium-high heat. Add garlic and cook until fragrant, 20 to 30 seconds. Add spinach and cook, stirring, until just wilted, about 2 minutes. Stir in beans, broth and the remaining 1/4 tsp. pepper and 1/8 tsp. salt. Cook, stirring occasionally, until heated through, 1 to 2 minutes. Cut each mushroom into thin slices and serve over the spinach. Top with the reserved onions and cheese.

 

Yield:

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