1/3 c. onion, minced
2 tbsp. butter, melted
2 tbsp. flour
1 tsp. salt
1/4 tsp. fresh ground pepper
1 c. sour cream
2 cans (14 oz. size) asparagus spears, drained
1/2 c. sharp Cheddar cheese, grated

Saute onion butter, but don't brown. Add flour, salt and pepper; mix well. Cook for 4 minutes. Add sour cream; heat well, but do not boil mixture. Place asparagus in a shallow baking dish and cover with sour cream mixture. Sprinkle cheese over top. Bake uncovered at 350 degrees for 10-15 minutes or just until cheese melts and it's thoroughly heated.