Cook from thawed.
Stove Top: In a skillet, add a little olive oil over medium heat and season Sirloin with a little salt and pepper. Cook for 4 minutes per side for rare, 6 minutes per side for medium and 8 minutes per side for well-done.
Grill - Pat Sirloin dry and season with salt and pepper. Place on hot oiled grill and grill about 4 minutes on each side for medium rare.