While much of the original religious significance of St Patrick’s Day may have dwindled over the years, the holiday is still widely celebrated around the world and to mark the occasion, Oreo is giving people the chance to win its new range of Frozen Treats. However, entering may be easier said than done as the competition requires you to spot a rainbow over the St Patrick’s Day weekend and send your pictures in via social media. Oreo expands its range of Frozen TreatsJust in time for St Patrick’s Day, Oreo is expanding the range of Frozen Treats it launched in 2022 with a new batch of mint-fla…