Preheat oven to 375° F. Remove stem end from each squash, cut in half, scoop out and discard seeds, flip cut side down onto cutting board and slice so you have little half rings (approx 1/4 to 1/2-inch thick). No need to peel delicata, which is why I love it!
Put the squash slices in a bowl, drizzle with 1–2 tablespoons oil and toss to coat. Spread out in a single layer on a rimmed sheet pan and bake 15 minutes until the down-side of each piece is caramelized. Flip each slice and return to oven about 10 more minutes, to caramelize other side. Sprinkle with flake salt and enjoy!