Warm Balsamic Steak and Vegetable Medley

Bahan-bahan (4 porsi)

• 1 lb sirlon steak, about 1 inch thick
• 8 cherry tomatoes
• 8 yellow tomatoes
• 1 bunch asparagus, bottoms removed
• ½ red onion, chopped
• 3 tablespoons olive oil
• Kosher salt and black pepper, to taste
• 5 oz gorgonzola cheese
• 1/3 cup walnuts
• 3 cups spring mix
• 1 tablespoon balsamic vinegar