Beef Caesar Rice Salad

Ingredients

• ¼ cup Parmesan cheese
• 3 tablespoons butter, softened
• 2 tablespoons lemon juice
• 1 tablespoon Dijon mustard
• 1 teaspoon lemon zest
• 1 ½ teaspoons anchovy paste
• 1 clove garlic, minced
• ⅛ teaspoon hot pepper sauce
• 3 cups hot cooked rice
• 1 pound sirloin steak, grilled and sliced
• 1 cup spinach, finely chopped (plus more for serving)
• ½ cup walnuts
• ½ cup black olives, sliced
• spinach or romaine lettuce