Lockhart Smokehouse pitmaster Will Fleischman. (Photo ©Chris WIlkins/Texas BBQ Posse) While we were at Lockhart Smokehouse in Dallas the other day, pitmaster Will Fleischman stopped by our table to explain his recent experiments cooking turkey breast. He didn’t have high hopes, he admitted, but the final product turned out well and will soon be added to the regular menu. We tried some and it was excellent. As Fleischman talked, it occurred to us that here was another example of the phenomenon we wrote about recently, the young hipster pitmaster who is changing Texas barbecue. Last year Fleischman was named one…