Corn Casserole with Sausage

pkg pork breakfast sausage (, cooked, crumbled, drained)

onion (, chopped)

melted butter

eggs (, beaten)

whole kernel corn (, drained)

creamed corn

sour cream ((I use light sour cream))

diced tomatoes and chilies (, drained)

jalapeño (, seeded and chopped)

sharp cheddar cheese (, or reduced fat cheese)

pkg Jiffy Corn Muffin Mix

salt and pepper