| 1 1/2 pounds fresh asparagus spears, trimmed |
| 1/3 cup frozen orange juice concentrate, thawed (from a 6-ounce can) |
| 2 tablespoons red wine vinegar |
| 1/8 teaspoon ground black pepper |
| 1 pound (about 5 cups) fresh white mushrooms, sliced |
| 1 1/2 cups cherry tomatoes, quartered |