Pepper Steak with Squash and Mushrooms

Prep Time 20m Total Time 50m

Ingredients in this Recipe

1 1/2 tablespoons coarsely ground black peppercorns
1 medium onion, cut into 8 wedges (along with core)
1 package whole button mushrooms, (10 ounces)
1 small butternut squash, (about 1 3/4 pounds), halved, peeled, seeded, and cut into 1 inch pieces
1 tablespoon plus 1 1/2 teaspoons olive oil
1 top round or London broil steak, (1 1/2 pounds, about 1 1/4 inches thick)
2 tablespoons whole grain mustard
Coarse salt

See Full Recipe at Martha Stewart