With hopes of a June opening dashed, restaurateur Edgar Watson says Bosque Café (named for the Texas county), his new restaurant on Ross and Leonard across from the Morton H. Meyerson Symphony Center, will unbolt the doors by the end of next week. He explains that the limited menu in his 70-seat restaurant in one of downtown Dallas' last 1920s-era art deco buildings will be a rapidly fluctuating New-American rainbow solidly fixed in Southwestern sensibilities and changing roughly every two weeks. "It's a glorified blackboard menu in a way," he says. To accomplish the feat, Watson hired former Salve! sous chef Daniel Regan. Watson, who made his mark with a handful of hip-Ital spots in the '80s and early '90s including Adriano's, Acapella, and Adagio Café, says Bosque Café is a small, intimately casual place without much commotion, which means you don't need to use your elbows. "We're not really looking to do a massive amount of trade," he says. "Initially we're going to start kind of soft."...AquaKnox/Fishbowl Executive Chef Ethan Powell is bailing out of the bowl and returning to New Orleans and Commander's Palace where he was once a sous chef. Assuming Powell's Bowl role is Larry Doyle, onetime chef of the defunct Anzu...Michael Costa says his partner Dean McSherry is gradually retreating from DMC Hospitality, the consulting firm they founded in June 1999. McSherry has taken a position with the Lincoln Restaurant Group, a company that sells restaurant accounting and payroll services (the firm also owns Dakota's). Costa says he is purchasing McSherry's interest in DMC and hopes to bring on a limited partner sometime in the near future.