For the tortilla – 1/4 cup vegetable oil – 6 white corn tortillas cut into bite-sized piece – kosher salt to taste For assembly – 1 small red bell pepper small-diced – 1 small green bell pepper small-diced – 1 small sweet onion small-diced – 6 large eggs – 1 tablespoon milk or heavy cream – 3/4 teaspoon kosher salt – 1/2 teaspoon black pepper – 10 ounce can diced tomatoes with green chiles drained – 1 cup shredded Monterey Jack cheese divided – 1 cup sharp cheddar cheese divided – 1/4 cup fresh chopped cilantro plus more for garnish – favorite taco toppings