Salsa Roja might sound exotic to gringos but it roughly translates as red sauce, a simple nomenclature that includes any salsa made with tomatoes as the base. I've been getting questions about it lately, so I wanted to offer up a couple options that should cover you next time Salsa Roja is called for.
In other words, there are countless interpretations of Mexico's most common salsa. The ingredient list for Salsa Roja will change based on which region you're in, and who's cooking it, and what kind of mood they're in.