Well-cooked mushrooms are also a good meat alternative. Some studies even suggest that fungi are more similar to meat than to vegetables. They require very little space to grow and are probably more efficient than raising bugs. Also, if you soak tree nuts, they produce more protein. Two soaked Brazilian nuts per day can take care of an adult's protein needs and give the most proper dose of selenium, which helps prevent cancer. (More than 2-3 per day can be bad for you, though!) There are a lot of healthy alternatives to meat, and not all of them will make you want to scream 'Ew!'