Almond milk is used as a protein, even though it is lower in protein than soy milk. Many people are not fond of the flavor of soy milk, so in order to make your protein serving well-rounded, you may “split the protein serving” between almond milk and nuts or seeds.
That would look like the following:
4 oz. almond milk = half a protein serving
1 oz. nuts or seeds = half a protein serving
Together they equal one protein serving.
You may do this with soy milk as well if you want to have some nuts or seeds with your meal.