Cube the beef and mix with your favorite BBQ sauce. Cover and marinate for at least 4 hours or overnight.
In a medium bowl whisk together the buttermilk, melt butter and eggs. Set aside.
In a larger bowl whisk together the cornmeal, flour, sugar, baking powder & soda, salt and jalapenos. Pour in the egg mixture to the dry ingredients and whisk until smooth.
In a small bowl whisk together the juice and zest from the lime with the sour cream. Set aside.
Make your waffles per your waffle maker’s instructions.
While making waffles, get a large skillet hot, add the oil and brown the beef, searing on all sides for 6-7 minutes.
Divide the BBQ beef cubes over each waffle and drizzle with lime and sour cream sauce. Top with chopped cilantro leaves and serve.
Notes
I get bottom round that's been cubed into bite size pieces from the meat section or ask your butcher.