Spaghetti with Seared Raddichio, Steak, and Balsamic Sauce (FM)

• Salt
• 2 tablespoons olive oil
• 8 ounces sirloin, skirt, or other beef steak
• Black pepper
• 1 pound radicchio, cut into ribbons
• 1 large red onions, halved and sliced
• 1 tablespoon minced garlic
• 8 ounces spaghetti or other long, thin pasta, preferably whole wheat
• 2 tablespoons balsamic vinegar, or to taste
• 1/2 cup roughly chopped fresh basil [Didn't have any this time around; don't think it would've helped.]

Mise en place.

Searing steak.

Cook radicchio, onion, and garlic over medium heat for 5 minutes uncovered.  Then lower heat and cover.

Thinly slice steak.  Add vinegar to skillet, let it bubble a bit, then throw it all together.

I wouldn't consider the radicchio exactly seared.  The dish was frankly underwhelming, as if this could pretend to be a full-on steak dinner or something.  Yet it's not.