Protein is an essential nutrient to your diet.  Going for more than a day or two without protein is unwise and can cause unwanted weight loss or loss of muscle mass.  Consuming adequate protein on an all liquid or soft diet may be difficult or unappetizing depending on your diet restrictions or required modifications.  If you need to consume a completely liquid or pureed diet, try to incorporate proteins such as:  beans pureed into a soup (like black bean soup), pureed tofu in soups, hummus, or puree canned soups and stews to a completely liquid consistency.  You can also process meats (ground meat, chicken, or seafood) into a smooth consistency.  Adding a little broth or sauce can turn these foods into a more liquid texture.  If you can consume soft or tender foods and do not need a liquid or pureed diet, try foods like:  meatloaf or meatballs mashed with a sauce or gravy, soft baked fish (like tilapia or salmon), tuna/egg salad, mashed tofu, scrambled eggs, mashed beans, stews or soups, and braised or roasted meats like brisket or pot roast that are fall apart tender. Many dairy products work well with restricted or modified diets.  Dairy is full of protein, calcium, and Vitamin D and can help you maintain a balanced diet more easily.  Add regular or greek yogurt to your day.  Yogurts are great smooth foods that are appropriate on a pureed or soft/mushy diet.  Regular yogurt may be easier to chew and swallow as it has a thinner consistency compared to greek yogurt.  Choose which type is more appropriate for you. Cottage cheese is another very high protein dairy food that will fit into a liquid or soft diet.  If you need your foods completely pureed, add cottage cheese to a blender or food processor for a pureed consistency. Drinking milk or adding milk to different foods (soups, stews or smoothies) can offer you another easily swallowed protein source. If you are lactose intolerant or have a milk allergy, try dairy alternatives like soy or almond based milks, yogurts, and cheeses. Many fruits and...

TL;DR in Vietnamese:
Bao gồm thực phẩm mềm cung cấp protein vào chế độ ăn uống. Dùng sản phẩm chế biến từ sữa như nguồn protein thay thế. Nấu và sơ chế hoa quả cũng như rau củ cho đến khi chín mềm. Lựa chọn ngũ cốc một cách cẩn thận. Nấu súp hoặc làm sinh tố. Tìm mua thức uống thay thế bữa ăn chính. Tìm mua thực phẩm bổ sung vitamin dạng nước.