Depending on the quality of the image, the OCR can read text from a full page photo fairly well. This quality depends on other factors such as lighting, shadows, flatness of the page, etc. so see what works best for you!
Note, you can choose multiple areas on the same photo (by adding the same photo again) or add a second photo if the text is not visible in the first. There is no limit on how many times you can use the same photo to select additional steps / ingredients though, only three separate photos.