1. Preheat the oven to 375 degrees F.
2. In a large mixing bowl, whisk eggs together with milk, cornstarch, and mustard.
3. Stir in scallions, drained mushrooms, tomatoes, and ham. Season liberally with salt and pepper. Transfer mixture to a 9-inch pie plate or quiche dish.
4. Top with shredded cheese and croutons. Bake until the center is set 30-35 minutes. Let cool on a wire rack. Serve warm or at room temperature.
Sponsor recipe courtesy of Kelsey Nixon for Cans Get You Cooking®