Joanna Gaines has shared a time-saving hack for adding fresh vegetables to meals. She suggests setting aside 30 minutes at the beginning of the week to clean and chop veggies and fruits. Gaines recommends roasting the veggies to save on clean-up time, lining the baking sheet with foil and drizzling with olive oil before baking at 425 degrees for 20-25 minutes. She also mentions that not all vegetables stay fresh for the same duration, and advises storing prepped veggies in airtight containers or resealable bags to maintain their freshness.