Trim off the tops of the mini peppers and clean out the insides.
Boil the rice for 12 minutes and rinse under cold water to stop the cooking process.
Heat a pan and add 2 tbsp of butter. Once the butter is melted, add the onion and saute until softened.
In the same pan, add the grated carrot and the remaining butter, and sauté until the carrots are tender. Remove from the heat and allow to cool.
In a large bowl, combine the rice, vegetable mixture, pork, chicken, garlic, mayo, dill, and seasoning. Mix until everything is well incorporated.
Stuff every pepper with the filling and arrange in a casserole dish.
In a saucepan, whisk together ketchup, sour cream, and butter, and bring to a soft boil.
Whisk in the chicken broth, cream, salt, and pepper.
Pour the sauce over the peppers and cover with foil.
Bake at 400°F for 40-50 minutes, or until the peppers are tender and cooked through.
Serve the stuffed peppers with sour cream and fresh dill.