In light of the recent thread about kale, I thought I'd post this recipe. I'd always tolerated kale, but this made me an enthusiastic fan. I like to use Lacinato kale, a.k.a. black kale or dinosaur kale. It is a very dark greyish green with long slender leaves.
Sautéed Kale
1 pound kale, tough stems and center ribs discarded and leaves cut into 1-inch-wide strips (8 cups)
2 tablespoons olive oil
1 small red onion, halved lengthwise and thinly sliced crosswise
1 garlic clove, minced
Pinch of dried hot red pepper flakes
1 tablespoon red-wine vinegar, or to taste
1/4 teaspoon salt
Cook kale in a 6-quart pot of boiling salted water, uncovered, stirring occasionally, until just tender, about 10 minutes, then drain in a colander.
Heat oil in a 12-inch heavy skillet over moderately high heat until hot but not smoking, then sauté onion, stirring occasionally, until softened, 6 to 8 minutes. Add garlic and red pepper flakes and sauté, stirring, until garlic is fragrant, about 1 minute. Reduce heat to moderate, then add kale and cook, stirring occasionally, until heated through. Remove from heat and stir in vinegar and salt.
Makes 2 generous side dish servings.
From Gourmet, November 2003 (via epicurious.com)