Barbecue Seasoning Rub and Grilled Watermelon Salad

I loosely followed this recipe and used what I have.  The rub was really good!  I used some thick cut sirloins since I didn't have a tri-tip roast and that worked well.  For the salad, I used a mix of homegrown lettuce and spinach instead of arugula.  I have never grilled watermelon before!  It was delicious and so was the dressing.  I plan to cube the watermelon into smaller chunks next time I make it.