Cauliflower and brussels sprouts (or alien brains as they where called throughout my childhood) are pretty boring on their own but this mustard-caper butter is a really nice accompaniment to this dish. I steamed both the cauliflower and brussels sprouts separately in the microwave to save time and if you don’t have a mortar and pestle I’m sure a garlic press would do just fine.
2. Trim the base off the Brussels sprouts, then slice them in half or, if large, into quarters. Cut the cauliflower into bite-sized pieces.
3. Bring a large pot of water to a boil and add salt. Add the Brussels sprouts and cook for 3 minutes. Then add the other vegetables and continue to cook until tender, about 5 minutes. Drain, shake off any excess water, then toss with the mustard-caper butter. Taste for salt, season with pepper and toss again.