Beef Salad with Horseradish and Yogurt Sauce

Ingredients

• 2 tablespoons of olive oil
• 10 ounces of beef tenderloin, sliced
• 2 red onions, halved
• 7 ounces of yellow Romano beans
• 3.5 ounces of baby spinach
• 3.5 ounces of sun-dried tomatoes, sliced
• For the sauce:
• 3 tablespoons of Greek yogurt
• 1 teaspoon horseradish sauce
• 2 garlic cloves, crushed
• 1 tablespoon sour cream
• 1 tablespoon lemon juice
• 1 tablespoon tabasco