Add Vegan Sour Cream recipe

Signed-off-by: Anna Schumaker <Anna@OcarinaProject.net>

sauces/vegan_sour_cream.tex

@@ -0,0 +1,26 @@
+%
+% Copyright 2016 (c) Anna Schumaker.
+%
+\documentclass{../recipe}
+
+\recipeName{Vegan Sour Cream}
+\recipeMakes{1\half cups}{sour cream}
+\recipeSourceWeb{Vegan Sour Cream}{Food.com}
+
+\begin{document}
+\begin{ingredients}
+\addIngredient{16 ounces}{silken tofu}
+\addIngredient{1 tablespoon}{olive oil}
+\addIngredient{1\half tablespoons}{lemon juice}
+\addIngredient{2 teaspoons}{apple cider vinegar}
+\addIngredient{1 teaspoon}{sugar}
+\addIngredient{\half teaspoon}{salt}
+\end{ingredients}
+
+\begin{steps}
+\addStep{Place \ingredient{tofu}, \ingredient{oil}, \ingredient{lemon juice},
+	 \ingredient{vinegar}, \ingredient{sugar}, and \ingredient{salt} in
+	 a food processor or blender.  Process until creamy and smooth.}
+\addStep{Transfer to a container and refrigerate \textbf{1 hour} before serving.}
+\end{steps}
+\end{document}