Huevos Rancheros Brunch Casserole with Ham and Cheese

Name: Huevos Rancheros Brunch Casserole with Ham and Cheese
Ingredients: 3 tablespoons canola oil, divided; 6 (6 inch) corn tortillas; 1 (8 ounce) pre-cooked ham steak, diced; 0.5 cup diced yellow onion; 0.75 teaspoon kosher salt, divided; 1 (14 ounce) can black beans, drained and rinsed; 1 (4 ounce) can diced green chile peppers; cooking spray; 1 cup shredded Monterey Jack cheese; 1.75 cups pico de gallo; 6 large eggs; 0.25 teaspoon ground black pepper; 1 medium avocado, diced; 2 tablespoons chopped fresh cilantro