Preheat the oven to 400°F (205°C).
Place the sausage on a foil-lined baking sheet. Cook in the oven until nicely browned on all sides to an internal temperature of 155°F (68°C) using a thermometer. Set aside for 5 minutes then cut into chunks.
Heat the oil in a skillet over medium heat. Saute the peppers, onions, and garlic until softened and golden brown. Then mix in the sausage.
Set a pot of water over high heat until boiling.
Add the pierogies to the boiling water and cook according to the directions on the package. Drain and set aside.
Heat a non-stick pan over medium heat. Melt the butter in the pan. Once the butter starts to sizzle, brown the pierogies on both sides until they are golden brown.
Warm the roll in the oven for 2 to 3 minutes.
Serve the sausage and peppers with pierogies and sour cream. Enjoy with lemonade.