Beef Rolls with Spring Salad

Pat meat dry with paper towels and season with salt and pepper. Place cheese and onion-pepper mixture in center of beef pieces. Beginning with narrow end of meat, roll filling up tightly. Carefully flip meat seam side up and secure with toothpicks.

Place a medium skillet over medium-high; brush with 1 teaspoon oil. Place meat rolls, seam side down, in skillet and cook, turning occasionally, until beef browns and cheese melts, about 8 minutes (reduce heat if beef is browning too quickly). Transfer beef rolls to a plate.

Toss lettuce with vinegar and 1 teaspoon oil; season with salt and pepper. Remove toothpicks from beef rolls; serve with salad.