Butternut Squash is easy to grow, keeps a long time unrefrigerated, is very healthy, reasonably low in carbohydrates, and produces large fruit with lots of delicious, edible flesh, and very little waste. I don't do a large amount of work growing it, as my husband manages all that, but I can see that he basically puts out the plant along with a few other types of squash, aims for decent soil, and makes sure it can get plenty of sun and water. (Later, I will try to post some information about my husband's terrific reasonably-priced watering system for our garden.)
Most people I know think you have to bake Butternut Squash and then either make some kind of pureed soup out of it, or make a sweet bread. I've done those things with it, and am always impressed with any sweet bread, because I love pretty much all baked treats, but I'm never so pleased with the soups. We ate the soups - I think I like them better than my husband does, but there is always a slight struggle to eat all of it without some going to waste, because it is never quite the intensely amazing soup I envisioned.
So here's a great idea: Butternut Squash benefits by treating it as though it is more like a yam, and then seasoning it in your choice of Asian styles. You can peel the raw squash pretty easily with a good potato peeler. Once it's peeled, a large, sharp knife will dice it up without too much effort. Butternut squash is definitely woody and dense when raw, but peeling it first makes the initial big cuts much easier than you would think.
One of my best methods of using the squash is as follows: I steam my diced squash about 20 minutes until it is cooked, but still quite firm, and dump it in my pan-cooked dish right at the end of cooking, so it doesn't get mushy. Chicken and pork work best with this type of dish, but beef will do in a pinch. A couple times I used pork sausage but don't use much or any curry powder with sausage, in case it clashes. Onions are good in this type of dish, as are a few black beans or garbanzo beans. Whatever vegetables you like or have on hand are great. I add garlic, and a pretty good amount of curry powder, a couple tablespoons of plum jam, or apple butter, or brown sugar, or some apple juice to sweeten it up a bit. I also generally add some raisins and some Sriracha (Red Rooster) hot sauce. Don't put alot salt in it, but rather, serve it over rice with some soy sauce on top and voila! - the best butternut squash dish this side of the Himalayas.
Occasionally I do this spiced more like Chinese food - no curry powder, whole anise seed and fresh, ground ginger at the beginning, ( - okay, sometimes we don't have fresh ginger and I just shake some of the powder stuff in - ), plus white pepper and a pinch of clove powder and a pinch of cinnamon later. Always garlic, and a little Sriracha sauce if you like.
There is also the standard American-style beef or pork roast which you can add big chunks of your raw butternut squash too along with your other veggies - very yummy. If you wait to put the squash in until about thirty minutes before the roast is done, it will be nicer (more firm, less mushy).
I will try to post a picture of one of the dishes with the diced squash, but it will have to wait until next fall, as we just had our last fresh squash from the garden for this past growing season.
I haven't tried processing acorn squash in the same manner yet, but it might work if you can get it chopped first into sections and then peel it. Delicata squash is super-delicious, and not hard to process, but we find the fruit small and the plants a bit fussy to raise, plus the length of time it will keep is shorter than acorn or butternut squash. Spaghetti squash is useful for many dishes, but lame in the one I just described, however, the fruit is generally large and plentiful on each and every plant - it seems the least fussy of all the squash plants we've tried to grow. I often add a bit to Italian tomato-based sauces, but I am not sure my husband is quite as enthused about that as I am. One great thing about spaghetti squash - it is surprisingly low in calories and carbohydrates, less than the other three. The best thing I do with it is add it to red lentils, usually with curry-style spices and serve it over rice. It adds some low-carb veggies to your beans, lowers the calories of your dish, and the flavor compliments the red lentils well.