Tomato juice from tomato paste is the easiest homemade juice to prepare. This juice can not only be drunk in its pure form, but also added to cocktails, stewed meat in it, or made soups and gravies based on it. To get a good result, you must maintain proportions. The ratio of paste to water is 1:3. If you want to get liquid tomato juice, then 1 tablespoon per glass of water. If you want a thicker result, then use 2-3 tablespoons per glass of water.