Seared Scallops With Cabbage and Leeks

3 tablespoons olive oil 1 large leek , white and pale green parts only, halved lengthwise, thinly sliced crosswise and rinsed well 1 lb green cabbage , halved[...]

12 sea scallops 2 large leeks , trimmed, thinly sliced and rinsed well 2 cups mache or 2 cups baby arugula 1 large lemon 1 tablespoon butter 2 1/2 tablespoons[...]