Balsamic Grilled Vegetable Medley

Ingredients

• ¼ cup extra-virgin olive oil
• 2 tablespoons balsamic vinegar
• 1 tablespoon red wine vinegar
• 1 teaspoon dried oregano
• ½ teaspoon dried basil
• ½ teaspoon garlic powder
• 1 teaspoon Dijon mustard
• Salt and pepper, to taste
• 1 green bell pepper, sliced
• 1 yellow bell pepper, sliced
• 1 red bell pepper, sliced
• 2 yellow squashes, sliced
• 2 zucchinis, sliced
• 1 small yellow onion, sliced
• 1 bunch asparagus, chopped into 3-inch stalks
• 4 ounces feta cheese
• Balsamic reduction, to taste