Creamy Asparagus Tart

INGREDIENTS

• Pastry for single-crust pie
• 1 Tbsp. vegetable oil
• 1 small sweet onion or leek, thinly sliced (about 1/4 cup)
• 1/2 lb. fresh asparagus, cut into 2-inch pieces
• 1 cup Swiss cheese (about 4 oz.)
• 1/2 cup Hellmann's® or Best Foods® Canola Cholesterol Free Mayonnaise
• 2 eggs
• 2 tsp. Dijon mustard
• 1/4 tsp. ground black pepper
• 1/2 cup milk