Coat a 2-quart baking dish with cooking spray.

Heat oil in a medium skillet over medium heat. Add the onion and pepper and saute until softened, about 3 to 5 minutes. Remove onion mixture from heat. 

Place the bread, asparagus, half the onion mixture, and 1 cup cheese in the baking dish.

Coat a 2-quart baking dish with cooking spray. 

Heat oil in a medium skillet over medium heat. Add the onion and pepper and saute until softened, about 3 to 5 minutes. Remove onion mixture from heat. 

Place the bread, asparagus, half the onion mixture, and 1 cup cheese in the baking dish.

In a medium bowl, whisk the eggs, milk, mustard, salt, black pepper, and 1 tablespoon chives.  Pour over the bread mixture in the baking dish.  Top with the remaining ½ cup cheese and onion mixture. 

Cover and chill for at least four hours and up to 24 hours.  Preheat oven to 350˚F. Cook, uncovered, for 45 to 50 minutes or until lightly browned on the top and set in the center. 

* Aspargus can be steamed, roasted, or microwaved. 

Per Serving: Calories: 316, Carbohydrate: 24 grams, Fiber: 2 grams, Protein: 19 grams, Fat: 16 grams, Saturated fat: 7 grams, Cholesterol: 206 milligrams, Sodium: 548 milligrams, Calcium: 410 milligrams.