Oh, so I just found that I have my recipes stashed on this computer too! Here's a very nice, fairly simple witbier that will give you a good starting point. It's not 100% traditional, but it's pretty close.
50% Pilsner Malt
45% Wheat Malt (if you want to go more traditional, go unmalted or torrified and shift the percentage just a bit higher)
5% Flaked Oats
Styrian Goldings - add a bittering addition to get you to around 12-13 IBUs, then I like to throw in the rest of the packet with the spices.
Coriander - I go ~1 - 1.5oz for 5 gal in the boil at 5 min, then some more in secondary
Bitter Orange Peel - boil 5 min. Choose your quantity based on the flavor balance you want against your coriander.
Sweet Orange Peel - I use this in secondary, maybe an ounce or so, because I really like the aroma. I'd steep this and the coriander (for secondary) in hot, sterile water until they give up their flavors, then add the whole mixture into the secondary fermentor. This isn't strictly necessary, but it really boosts the spicy & citrus aroma.
Yeast: Okay, I really like wlp410, but since that's a seasonal strain (late spring, early summer), you could go wlp400, or maybe wyeast forbidden fruit. There are several good choices for witbiers.
I don't have my notes on hand for the mash, but I've done this a couple ways. If I remember correctly, my favorite was actually a decoction mash with rests at (hopefully these are the right numbers) 131, 147, and 156. However, I don't think you'd be wrong to save some time and just do a plain old single infusion.