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Adjust rack to top position (top and middle positions for 12 servings) and preheat oven to 375 degrees. (TIP: Keep biscuits refrigerated until ready to use; they’re easier to work with when cold.) Bring 1 TBSP butter (2 TBSP for 12) to room temperature. Wash and dry produce.
Coat a baking sheet (two baking sheets for 12) with nonstick cooking spray and set aside.
Trim and thinly slice scallions.