START TO FINISH: 20 minutes MAKES 4 sandwiches
2 tablespoons olive oil
1 large sweet onion (such as Vidalia or Walla Walla), halved and thinly sliced (about 2 cups)
4 refrigerated or frozen grilled vegetable meatless burger patties
2 tablespoons mayonnaise
1 teaspoon yellow mustard
4 1⁄2 -inch slices ciabatta bread, toasted
1 cup fresh baby spinach
2 tablespoons steak sauce
1 In a large skillet heat oil over medium-high heat. Add onion; cook for 8 to 10 minutes or until very tender, stirring frequently.
2 Meanwhile, heat patties in the microwave oven according to package directions.
3 In a small bowl combine mayonnaise and mustard. Spread mixture over 1 side of bread slices. Top with spinach and patties. Stir steak sauce into cooked onion; spoon onion mixture on top of patties.
PER SANDWICH: 329 cal., 20 g total fat (3 g sat. fat), 3 mg chol., 688 mg sodium, 21 g carb., 5 g fiber, 18 g pro.
