Recipe information
Yield
4 Servings
Ingredients
6
1
4
8
8
2
Need to make a substitution?
Preparation
Step 1
Heat 4 tablespoons oil in heavy large skillet over medium-high heat. Add rosemary and stir 30 seconds. Add mushrooms. Cover skillet and cook until mushrooms are tender, stirring often, about 8 minutes. Season mushrooms to taste with salt and pepper; transfer to plate. Wipe out skillet.
Step 2
Arrange 4 bread slices on work surface; spread with mustard, if desired. Top bread slices with cheese, then mushrooms and arugula, dividing equally. Top each with bread slice; press to compact. Brush tops lightly with oil.
Step 3
Heat reserved skillet over medium heat. Place sandwiches, oiled side down, in skillet. Brush tops lightly with oil. Cover and cook until golden on bottom, occasionally pressing with spatula, about 5 minutes. Turn sandwiches over. Cover and cook until golden on bottom and cheese is melted, about 5 minutes longer. Transfer sandwiches to plates; cut in half and serve.