To prep your squash, wash it, and then cut both ends and peel the skin off with a vegetable peeler.
Slice the peeled squash in half. You can remove the seeds and any squishy pulp if these seeds are too large (as in older squash).
Now slice each half lengthwise, then across to form bite-sized cubes.
Heat oil over medium heat in a deep skillet or stock pot (need a lid).
Add the red/green chili until it turns dark, for about 30 seconds.
Add the cumin seeds, let them sizzle, and immediately add the finely diced onion. Do this quickly so that the cumin seeds don't burn.
Sauté the onions until they are medium brown (5-7 minutes).
Add the ginger-garlic paste along with the turmeric and chili powder. Stir.
Now sauté the mixture for about a minute or so, until you feel the ginger-garlic paste sticking to the bottom of the pan.
Add the chopped tomato. Continue to sautée for another 5-7 minutes until the tomatoes are well cooked and mushy.
Add the squash, stir, and sauté for approximately 2 minutes until the squash is nicely coated with the onion-tomato mixture (masala).
Add the water and salt. Stir, cover, and cook for about 20 minutes until the squash is fork-tender.
Pour into a serving dish and garnish with chopped cilantro.
Serve with boiled white or brown rice, roti, or as a side to a meal.