Ingredients
1 tablespoon olive oil
1 small red onion, diced small
1/2 teaspoon red-pepper flakes
1 head escarole, cored and chopped
Coarse salt and ground pepper
Juice of 1/2 lemon
Preparation
In a large skillet, heat olive oil over medium-high. Add red onion and red-pepper flakes; cook until onion softens, 3 minutes. Add escarole. Cook until wilted, 3 minutes. Season with salt, pepper, and lemon juice.