Bring freekeh, salt, and 2 1/2 cups water to a boil. Promptly reduce heat to the low and simmer until grains are tender and liquid is absorbed.
In the Instant Pot:
Place freekeh in the pot of a multi-functional pressure cooker with 1 2/3 cups water. Seal, select "Multigrain," and bring to High Pressure over "Normal" setting. Set timer for 10 minutes. Allow 10-15 minutes for multi-cooker to come to pressure. Release pressure naturally, 10 to 20 minutes. Drain extra water.
In the Microwave:
Place freekeh in a deep, microwave-safe bowl and cover with 2 cups boiling water. Season with salt. Microwave, uncovered, on High until liquid is absorbed, 10 to 15 minutes. Check occasionally that the water does not boil over.
Stovetop variation for whole-grain freekeh: cook for 35-45 with 3 1/2-4 parts liquid for every part freekeh.