My favorite thing to do with yellow squash is make raw "SPAGHETTI" MARINARA with it.
I have a spiral cutter, which makes it a snap to turn yellow squash into long thin strands of faux pasta. But if you don't have one, you can still use a cheese shredder or a julienne peeler to make long thin "noodles" the whole length of the squash. Or a mandoline with fine cutters works too. Personally I peel the squash first, but not everyone does. In any case, once the raw"pasta" is all cut I toss it loosely in a big bowl with a little olive oil to separate the strands.
On to the sauce...
I do this one by taste and feel now but let me guess at the proportions:
1/2 cup sun dried tomatoes, soaked in a little warm water 30 minutes to soften
3 fresh tomatoes
1 garlic clove
1/4 med onion
1 TBS fresh chopped basil
1 tsp oregano
big pinch black pepper
1/4 - 1/2 cup olive oil
juice of a lemon
4 dates, pitted
optional, a couple of fresh dates, pitted OR some raisins
some flat leaf parsley
Core the tomatoes and coarsely chop
Coarsely chop everything else
Toss all the sauce ingredients in a food processor and pulse-process until you have the texture you wish. Or use a high speed blender, but just pulse it, don't over-process it.
Heap some of the "pasta" in the bottom of an individual bowl, and spoon the sauce over the top.
If you eat cheese you can grate some parmesan over the top. If you don't, a little grated macadamia nut makes a nice visual substitute for cheese.
The fun thing is that it looks so much like a real bowl of spaghetti that if you bring it out already served up everyone just dives in... then they notice it is cold, rather than hot... but it tastes right... and it tastes goooood... so they keep going, but they're looking around the table at others while they try to figure out what is going on... bwaaaahahahahaha.
Then you let them in on your secret, that it's actually a salad that just looks like a bowl of spaghetti, and everyone laughs. And it's all just raw vegetables. I've never met a soul that didn't like it, and get a kick out of it.
Amazon.com: Joyce Chen 51-0662, Saladacco Spiral Slicer, White: Home & Kitchen
Amazon.com: New and Essential Tri-Blade Spiral Vegetable Slicer: Home & Kitchen
Zyliss Julienne Peeler: Amazon.com: Home & Kitchen