(Reuters) – A new photo released on Monday by Prince Harry and Meghan Markle showed their daughter Lilibet celebrating her first birthday in a backyard picnic over the weekend. Wearing a light blue frock and white bow on her head, the red-haired toddler sat on the grass in a candid snapshot taken by close family friend Misan Harriman on Saturday, a spokesperson said. A highlight of the intimate gathering at Frogmore Cottage in Windsor was a cake by American baker Claire Ptak, who created the wedding cake for the Duke and Duchess of Sussex in 2018. Lilibet Diana Mountbatten-Windsor was born in …