Heat oven to 400 degrees.

Toss asparagus with 2 Tbs water in microwave safe bowl.

Cover with plastic wrap and microwave until crisp-tender, about 2 minutes. Drain.

Whisk eggs, milk, and pepper in a bowl and set aside.

Heat oil in a saute pan, add onion and salt, and cook onion until soft, about 3 minutes.

Add bread, and cook, stirring frequently, until bread is toasted, and onions are lightly browned.

Transfer contents to a prepared baking dish, and add asparagus and egg mixture.

Stir so that mixture is incorporated. Dot with cheese.

Bake until top is puffed and edges have pulled away from pan - 15-20 minutes.