Ingredients
2 large heads escarole, trimmed and cut into 1 1/2-inch pieces
2 tablespoons unsalted butter
1 medium shallot, minced
3 garlic cloves, minced
1 tablespoon plus 1 teaspoon all-purpose flour
1 cup whole milk
Coarse salt and ground pepper
2 slices white bread, crusts removed, torn into large pieces
Preparation
Preheat oven to 400 degrees. Place a colander in a large bowl. Bring a large pot of salted water to a boil. In 2 batches, cook escarole until tender, 7 minutes, then drain in a colander, pressing with a spatula to squeeze out as much liquid as possible.
In a small saucepan, melt 1 tablespoon butter over medium. Cook shallot and garlic until tender, 4 minutes. Add flour and cook, stirring, 1 minute. Whisking constantly, add milk and cook, whisking, until mixture comes to a boil and thickens, 2 minutes. Remove from heat, season with salt and pepper, and stir in escarole. Pour mixture into a 1-quart baking dish.
In a food processor, pulse bread until coarse crumbs form; transfer to a small bowl. Melt 1 tablespoon butter and pour over breadcrumbs, stirring to combine. Season with salt and pepper. Top escarole with breadcrumbs and bake until golden brown and bubbling, 15 to 20 minutes.
