Cut broccoli florets leaving a portion of the stem with each floret. Place in baking dish or 12" dutch oven. Coat broccoli with olive oil and sprinkle with garlic salt. Placed covered dish in oven and cook for 20-30 minutes. Remove from heat and transfer to serving dish.
NOTE: This is the easiest side dish to make and I have people devouring large quantities who say they would never touch broccoli.