When summer squash is in season, it makes a delicious side dish. Its neutral, unassuming flavor works well with fish, chicken, pork and hearty vegetable main dishes. Incorporating summer squash into your diet allows you to benefit from its vitamin and mineral content, as it is a good source of vitamin C, vitamin K, folate, magnesium, calcium and manganese. Zucchini and yellow squash make good choices for boiling, and you can experiment with other, less common types of summer squash such as pattypan and chayote.