Chipotle Cheesesteaks - cooking recipe

Ingredients

1 tablespoon vegetable oil
1 lb leftover cooked roast (trimmed of any visible fat) or 1 lb steak (trimmed of any visible fat)
2 cups bell pepper and onions (mix bell peppers and onion as you wish tp make 2 cups total)
1 1/2 tablespoons unsalted butter
1 1/2 tablespoons all-purpose flour
1 cup warm milk
1/4 teaspoon fresh ground black pepper
3/4 lb sharp cheddar cheese, grated
1 tablespoon chopped chipotle pepper, in abodo sauce (you'll need 1 tablespoon of the abodo sauce too)
1 baguette, quartered and split

Preparation

Heat oil in a large cast-iron skillet over medium heat. Add pepper-and-onion mixture and cook until heated through, about 5 minutes. Add thinly sliced beef and cook with the pepper mix another 5 minutes Set aside and keep warm.
For cheese sauce, melt butter in a medium saucepan over medium heat. Add flour, whisking constantly until bubbly, about 1 minute. Slowly whisk in milk until thickened, about 3 minutes. Stir in black pepper, cheese, chipotle peppers, and adobo sauce.
Divide steaks and pepper-and-onion mixture among 4 baguette slices. Top with cheese sauce and remaining 4 bread slices.