Grilled Sirloin Tip Roast

• 2 tbsp Dijon mustard
• 1 tbsp lemon juice
• 1 tbsp crushed peppercorns 
• ½ tsp dried oregano 
• 3 - 5 lb Sirloin Tip Roast

In small bowl, combine mustard, lemon juice, peppercorns and oregano. Rub over all surfaces of roast and let stand at room temperature for 1 hour or longer in refrigerator. Cook covered over medium-hot coals or at medium setting on electric or gas barbecue. Allow 20 min/lb (45 min/kg) for rare or 25 min/lb (55 min/kg) for medium.

Source: Ranchers.net (ie. random google search hit)

Rachel's Thoughts: I added a tsp of salt to the mixture and some extra Dijon.  This rub is nice because it is not overpowering.