Under new ownership, the cozy Pax Americana space has morphed into “Plaid Americana,” with green patterned walls, deep green wood wainscoting, and vintage artwork. Thankfully, prices and portions also seem retro. At a recent lunch, we wolfed down perhaps the thickest, juiciest patty melt ever (the trick is caramelized onions) for $11; a hefty “cup” of meaty, spicy chili for $6; and a ridiculously big bowl of sweet creamed corn for $4. Our club sandwich—credible, though less interesting—proved so tall that we had to eat it in stages. With its modest prices and exuberant food, this outpost of the original BB Lemon, in the Heights, makes a welcome addition to the Montrose. We’ll be back for the more extensive dinner menu items and to try other menu items that caught our eye—tomato bisque, French onion soup, mussels, blue crab beignets . . .