Make using one of the following methods: Mash drained canned sweet potato. Or cook 2-inch chunks of peeled sweet potato (one medium) in boiling water for 12 minutes or until tender. Drain well and mash. Or pierce a 14- to 16-ounce sweet potato with a fork two to three times; microwave 4 to 5 minutes or until tender. Cool, halve, scoop out flesh and mash; discard skin.
Make-ahead: At this point, you can cover both bowls and refrigerate up to 8 hours before continuing with Step 2. Increase the oven temperature to 425° F when you remove the turkey. Prepare and bake biscuits while turkey rests.