Added a simple, well known sauce.

src/simple-sauce.md

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+# Simple sauce
+
+This is a simple and well known recipe. It goes by many names and this recipe is a starting point for many sauces, for eg. '1000 Island sauce' starts out with tomato sauce and mayonaise and then a bunch of other things gets added. You can use this sauce with your fries or anything else that you might use sauce for or as a base for another more complicated sauce.
+
+## Ingredients
+
++ Tomato sauce.
++ Mayonaise
+
+## Method
+
+Mix one part tomato sauce with two parts mayonaise. What 'part' means is up to you, because that will determine how much dip you will have. You can also adjust this to your liking. More tomato sauce, more acidity. More mayonaise, more sweetness.
+
+## Contribution
+
+By el3ctr0lyte