Beef and Broccoli Salad

Ingredients (11)

• + 1 ½ pounds broccoli - cut into florets, stems peeled and sliced 1/4 inch thick add to pantry
• + 2 tablespoons white wine vinegar add to pantry
• + 2 teaspoons Dijon mustard add to pantry
• + ½ teaspoon prepared horseradish, or to taste add to pantry
• + ¾ teaspoon salt add to pantry
• + ⅛ teaspoon ground black pepper add to pantry
• + ½ cup olive oil add to pantry
• + 3 tablespoons sour cream add to pantry
• + ¾ pound thick sliced deli roast beef, cut into 1/2-inch pieces add to pantry
• ✓ 2 ½ cups cherry tomatoes, halved
• + 6 green onions cut diagonally into thin slices add to pantry