Ingredients for 4 portions: (exact measurements are not critical, as you can stuff these with anything that fits) For the filling: 1 tbsp vegetable oil, divided (half for veggies, half to cook chicken) 1/2 cup diced onions 1/2 cup diced poblano peppers 1/2 cup sliced mushrooms 12 oz boneless skinless chicken breast meat, cut in 1/2-inch cubes salt, freshly ground black pepper, cayenne pepper to taste 1/4 tsp cumin 1/4 tsp chipotle, smoked paprika, or other hot or mild ground chili pepper pinch dried Mexican oregano 1 or 2 tbsp cold water to deglaze pan once chicken is browned 4 ounces grated pepper Jack cheese Also: 4 large flour tortilla (at least 10-inch wide) 1 egg white 2 tbsp vegetable oil for pan-frying sour cream, guacamole, and salsa to garnish, optional