Warm Caramelized Onion Dip

INGREDIENTS

• 2 teaspoons olive oil
• 4 cups chopped onion (about 2 large onions)
• 3/4 teaspoon chopped fresh thyme
• 1/2 cup light sour cream
• 1/3 cup (about 1 1/2 ounces) grated Parmigiano-Reggiano cheese
• 1/3 cup (3 ounces) 1/3-less-fat cream cheese
• 1/3 cup reduced-fat mayonnaise
• 1/4 teaspoon salt
• 1/4 teaspoon freshly ground black pepper
• 1/4 teaspoon hot pepper sauce (such as Tabasco)
• 1/4 teaspoon Worcestershire sauce