Yes, in place of the rice we used to use as the carbohydrate source. (We were both on a diet for 4 or 5 months earlier in the year and gave up rice & potatoes [Mr EA gave up bread, too], and although we're not calorie restricting any more, we're sticking to not eating rice or potatoes.)

We steam the squash in cubes in the microwave, which is really quick, and pour freshly squeezed lemon juice on it when it's hot, then use it as a side dish to the curry. It's very tasty but it only works with curries that aren't too wet (as it doesn't absorb fluid) or too hot (it's not as cooling as rice). We use it in place of potatoes/potato salad, too. We tried it with stir fries but it didn't really work as well there. It's much lower calorie than rice, and it counts as a vegetable portion too. (I'm not very good at eating fruit/veg.)