Hummus is very good. Can buy it in refridgerated dips section. Or make it with garbonzo beans and tahini which is made from sesame seeds and add what every you like to season it. Most use lemon juice and if you like garlic. Some recipes in the store have pine nuts, or roasted red peppers. My family has it with either pieces of pita bread or some kind of cracker or chip. The beans make it a good source of protein. If she eats bread peanut butter on a whole grain bread or with milk would make a complete protein with all amino acids too. And lots of vegetables have some protein in them.
Tofu made from soy beans is also a complete protein and it comes in soft or firm (which isn't too much firmer than cottage cheese).
A soup with lentils and pureed would be soft and protein and nutritious.