Leftover Corned Beef Breakfast Hash

Name: Leftover Corned Beef Breakfast Hash
Ingredients: 1 tablespoon canola oil, plus more for cooking the eggs; 1/2 cup finely diced red or orange bell pepper; 1/2 cup thinly sliced mushrooms; 1/4 cup finely diced red onion; 1 clove garlic, finely minced; 4 ounces leftover cooked corned beef, cut into 1/2-inch pieces; 4 ounces leftover roasted or braised potatoes, cut into 1/2-inch pieces; Kosher salt and freshly cracked black pepper; 2 tablespoons thinly sliced scallions, plus more for garnish; 4 large eggs