Ingredients

• 1 lb grilling strip loin steak 1 inch thick cut
• 1/2 teaspoon salt
• 1/2 teaspoon pepper
• 2 tablespoons vegetable oil
• 2 cups mushrooms halved
• 1 clove garlic
• 1 teaspoon dried thyme
• 1 bag (6 oz/170 g) baby spinach
• 1/2 cup thinly sliced red onion

Creamy Horseradish Dressing:

• 1/4 cup light mayonnaise
• 2 tablespoons milk
• 2 tablespoons prepared horseradish
• 1/4 teaspoon salt
• 1/4 teaspoon pepper