1/2 c Butter or margarine 1 md Onion; sliced thin 2 Cloves garlic; minced or -pressed 1 tb Dry basil 1/2 ts Crushed red pepper 8 Chicken thighs (about 2 1/2 -lbs. total) rinsed and -patted dry 2 pk (10-oz) frozen chopped -spinach 8 oz Linguine or spaghetti Boiling salted water 1 c Grated parmesan cheese -(about 5 oz.) Salt 1 sm Orange (unpeeled) -quartered