How can vegetarians ensure they are getting enough protein in their diet?

Vegetarians can ensure they get enough protein by including a variety of plant-based protein sources in their diet such as beans, lentils, tofu, tempeh, quinoa, nuts, seeds, and whole grains. They can also consider incorporating protein-rich dairy alternatives like soy milk and yogurt. Supplementing with protein powders made from sources like pea, hemp, or rice can also help meet their protein needs.