Poblano Chiles Stuffed with Beef and Cheese (Chiles Rellenos)

Ingredients

• 8 large poblano chiles
• 1 1⁄4 lb. beef sirloin, trimmed and cut into 1⁄2" pieces
• 1 1⁄2 tsp. garlic salt
• 1 tsp. steak seasoning, preferably McCormick Montreal Steak Seasoning
• 1 1⁄4 cups extra-virgin olive oil
• 1⁄2 cup cooked short-grain white rice
• 1⁄2 cup cotija cheese, grated
• 1⁄2 cup monterey jack cheese, grated
• Salt and freshly ground black pepper
• 1 cup flour
• 6 egg whites
• 3 egg yolks