My daughter cut this recipe from a magazine years ago and it has become a favorite. The lady who posted it said she didn't know who "Fred" was or why it was named "Fred", but "Fred was just Fred in their house." So it has continued in ours. I do know that it's one dish that is a comfort food.
In a large skillet, melt butter, add EVOO and heat over medium heat.
Slice smoked sausage into about 3/4" slices and add to heated butter/EVOO. While browning meat to desired brownness, cut up vegetables. Add to skillet and cover. Turn down heat so as not to burn. Cook until tender.