Mini Beef Wellingtons

Ingredients

• 1 pound beef Tenderloin Steak, cut into 3/4-inch pieces
• 2 tablespoons canola oil, divided
• 1 package (8 ounces) mushrooms, chopped
• 3 tablespoons minced onion
• 1-1/2 teaspoons chopped fresh thyme
• 3/4 teaspoon salt, divided
• 1/2 teaspoon ground black pepper, divided
• 1 package (17.3 ounce) frozen puff pastry, thawed
• 1/4 cup Dijon-style mustard
• Horseradish sauce and chopped parsley, optional