1 (7 oz.) pkg. macaroni
3 tbsp. butter
3 tbsp. flour
1/2 tsp. salt
1/4 tsp. oregano
Dash pepper
1 2/3 c. milk
1/3 c. sliced onion rings, separated
1 1/2 c. (6 oz.) shredded Cheddar cheese
1/4-1/3 c. crumbled blue cheese