In a 10- by 15-inch baking pan, mix broccoli, oil, and 1/8 teaspoon salt. Spread in a single layer.
Bake in a 450° oven, stirring occasionally with a wide spatula, until broccoli is browned and tender when pierced, 20 to 25 minutes.
Meanwhile, in a bowl, mix balsamic vinegar and mustard. Add warm broccoli, walnuts, and frisée, if using, and mix to coat. Add salt and pepper to taste.
0 servings
* The % Daily Value (DV) tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.