Spice rubs are great for when you don't have time to marinate your meat.
Combine peppercorns, coriander, dill, red-pepper flakes, and salt in a small dish. Rub spice mixture evenly over both sides of steaks.
Heat grill to medium-high; lightly oil grates. Place steaks on grill; cover. Cook, turning once, until meat is desired doneness, about 8 minutes for medium-rare.
The spice rub can be doubled or tripled; keep the extra in an airtight container.