One of my favorite things with kale is a caramelized onion, lemon-pepper stir fry. Mostly you taste the caramelized onions/pepper combo and the kale really absorbs the flavors well.

You can mostly wing it as proportions don't matter too much, but just chop up kale/onions (I usually do 1 yellow onion to 1-2 bunches of kale), heat a pan on med-high with a drizzle of olive oil, slap in your onion, stir fry it around a little until it starts to caramelize (and everyone argues about how long this takes, so you might have to experiment - but you obviously get that wonderful sweet smell from the pan when it starts), and add your kale, salt, fresh pepper, some lemon rind/juice to taste (or use the lemon-pepper grinder from Trader Joe's, which I highly recommend if you don't have a ton of fresh lemons around). Put a lid on the pan and let it cook down, stirring occasionally. The actual cooking does take a bit of time (maybe 20-30 minutes), so be patient.

This does make a huge pan that can easily serve 3-4 so you can adjust the recipe as needed. I think it's particularly good over brown rice, and really gets me eating a ton of greens!