Chop the bell pepper and onion.

Chop the smoked sausage.

Drain and rinse the sauerkraut.

Cook mushrooms, onions, and bell peppers in butter in a skillet until softened.

In a crock-pot, cook sausage until heated through.

Add the cooked vegetables, sauerkraut, and Ro-Tel tomatoes to the crock-pot.

Add brown sugar, salt, and pepper.

Stir to combine all ingredients.

Cook in the crock-pot on high for 3 to 4 hours or on low for 5 to 6 hours, stirring occasionally.