Peanut sauce can be easily made by melting some peanut butter and mixing in soy sauce (start low and add, depending on how peanutty you want it) and a little sweetener. Thin with water. A little garlic and some chopped scallions work nicely. If you want specific proportions, a quick web search for "peanut sauce recipe" will serve you well.
The other suggestions for uses are very good, but here's another: thai pizza! Use your favorite pizza crust, and use peanut sauce in place of tomato sauce. Chop purple cabbage and carrots, and mix it in to the sauce layer with some sprouts. Top with grilled tofu, shredded Follow-Your-Heart mozarella, and some cilantro, and bake.