Smoked Trout Hash with Mustard Greens

Heat oil in a large nonstick skillet over medium-high heat. Add potatoes and cook, stirring occasionally, until golden and crispy, adjusting heat if necessary to prevent burning, 8 to 12 minutes.

Whisk mustard, vinegar, salt and pepper in a small bowl. Add to the potatoes along with trout and greens. Cook, stirring, until the greens are just wilted, 30 seconds to 1 minute. Remove from heat; stir 1 to 2 tablespoons water into the hash if it seems dry. Serve hot.