Step 1

Trim 1 pound raw rhubarb and cut crosswise into 1/2-inch pieces (about 3 cups). Place in a medium saucepan.

Step 2

Add 1/2 cup granulated sugar. If using 1 vanilla bean, cut in half lengthwise, then scrape the back of a paring knife along the cut side of each half to scrape out the seeds; add the seeds and scraped bean pod to the saucepan. If using vanilla bean paste or vanilla extract, add 1 teaspoon. Add 1/4 teaspoon kosher salt.

Step 3

Bring to a simmer over medium heat, stirring occasionally until the sugar is dissolved, 2 to 3 minutes. Reduce the heat to medium low and simmer gently, stirring occasionally, until the rhubarb is tender and beginning to fall apart, and a sauce is formed, about 8 minutes.

Step 4

Remove the saucepan from the heat and let cool for at least 10 minutes. Remove and discard the vanilla bean pod. Serve warm, at room temperature, or cold.