Weekend brunch lines are a consistent sight outside Grand Lake Kitchen, just north of Lake Merritt. Those long waits might be eased with the opening of a second location in Oakland’s Dimond district.

Husband-and-wife team Dave Wasem and May Seto opened Grand Lake Kitchen Dimond this week, carrying over the original restaurant’s most popular American brunch and deli-inspired dishes. Five years in the making, it’s a larger and more ambitious project at 5,500 square feet with a designated to-go area, a retail section and family-focused patio.

The 75-seat dining room features a full bar, turquoise banquettes, tiled floors and a slightly sleeker aesthetic compared to the original. Menus feature a few unique new dishes, including savory mushroom porridge and fried green tomatoes with pimento cheese.

The to-go area highlights soft serve ice cream, cookies, bottles of wine and quick deli sides like green goddess kale salad and tuna macaroni, though anything off the regular menu can be ordered there as well.

The retail section, meanwhile, features cookbooks, greeting cards, ceramics, T-shirts and other tchotchkes — a neighborhood gift shop, essentially.

Wasem and Seto are encouraging diners to bring their kids to the enclosed, 20-seat patio. An additional 20 seats or so will be added to the sidewalk soon. There’s also a private dining room available for events.

Grand Lake Kitchen Dimond: 2042 MacArthur Blvd., Oakland. Hours are 9 a.m. to 10 p.m. Wednesday to Monday; the restaurant will also open on Tuesdays starting in July.

Janelle Bitker is a San Francisco Chronicle staff writer. Email: janelle.bitker@sfchronicle.com Twitter: @janellebitker