If your child has been comfortable so far you can go ahead and give him new food as per convenience. The purpose of spacing new food is that should the child hv allergy or adjustment issues with any food, u wld know immidietly the food that is causing that. You know your child best. Go ahead and expeeiment with combinations. Beetroot juice can be given. just mk sure it is properly washed and peeled. you may steam it a bit and then mk puree and feed that or even mix that puree in khichadi or other food as it has a very distinct taste.