My family has been making what we call Spanish rice longer than I have been around. The recipe changes from family to family from region to region. Authentic is what they have available for ingredients. You can't just say one recipe is authentic. All cooked in frying pan no rice cookers allowed. My wife uses peas,carrots,corn chicken broth, and sometimes when the vegies aren't available she uses salsa or both. Depends on her mood. On the other hand my sister who was born in Mexico has a different recipe. These recipes are not on a flash card its been handed down.
I have had so many different dishes most all of them good.