Buffalo Chicken Stuffed Shells

• 2 tablespoons olive oil, plus more for baking dish
• 1/2 cup yellow onion, finely diced
• 1/4 cup celery, finely diced
• 1/4 cup carrot, finely diced
• 2 cups shredded cooked chicken, roughly chopped
• 1 1/4 cups buffalo, sauce (recipe follows)
• 1/2 teaspoon salt
• 1/4 teaspoon pepper
• 1 cup ricotta cheese
• 1/2 cup parmesan cheese, divided
• 1/2 cup blue cheese, divided
• 1 cup shredded mozzarella cheese, divided
• 1 large egg, lightly beaten
• 18 cooked jumbo pasta shells
• 1/4 cup ranch dressing
• 2 tablespoons thinly sliced scallion tops (garnish)
• Buffalo Sauce
• 3/4 cup hot sauce (Frank's Red Hot)
• 8 tablespoons butter, cut into pieces
• 1 tablespoon white wine vinegar
• 1/4 teaspoon kosher salt
• 1/8 teaspoon ground black pepper

1. Preheat oven to 400 degrees F. Heat olive oil in a medium skillet over medium heat. Cook onion, celery and carrot until vegetables are softened, about 5 minutes. Stir in shredded.
2. chicken, 1/4 cup buffalo sauce, salt and pepper. Set aside to cool slightly.
3. In a large bowl, stir to combine ricotta cheese, 1/4 cup parmesan cheese, 1/4 cup blue cheese, 1/2 cup mozzarella cheese and egg. Fold in chicken and vegetable mixture until combined.
4. Lightly coat an 7x10 baking dish with olive oil. Spoon 1/4 cup buffalo sauce into the bottom of the dish. Fill shells with chicken and cheese mixture and arrange in prepared baking dish. Top evenly with 1/2 cup buffalo sauce, 1/4 cup parmesan cheese, 1/4 cup blue cheese and 1/2 cup mozzarella cheese. Bake for 25 minutes.
5. Top shells with remaining buffalo sauce, a drizzle of ranch dressing and sliced scallions.
6. To Make the Buffalo Sauce:
7. Combine all ingredients in a small saucepan over medium high heat. Whisk until butter is completely melted. See aside to cool.
8. Makes 1 1/4 cup.

olive oil, yellow onion, celery, carrot, chicken, buffalo, salt, pepper, ricotta cheese, parmesan cheese, blue cheese, mozzarella cheese, egg, pasta shells, ranch dressing, scallion, buffalo sauce, hot sauce, butter, white wine vinegar, kosher salt, ground black pepper

Taken from www.food.com/recipe/buffalo-chicken-stuffed-shells-533994 (may not work)