Boorito Time:

Chipotle Mexican Grill has teamed up with UK Chef Jamie Oliver for a clever Halloween promotion to expose just how scary processed foods can be.

Just visit any Chipotle restaurant between 6 p.m. and closing on Oct. 31, dressed as a horrifying processed food product, and you’ll be treated to a burrito made with naturally raised ingredients for just $2.

Proceeds from the “Boorito 2010,” up to $1 million, will benefit “Jamie Oliver’s Food Revolution,” a campaign to get people to cook and eat fresh, healthful food.

Chipotle also will host an online costume contest, where customers can be photographed in their frightening processed food costumes at Chipotle’s, then can post the pic online here.

The grand prize winner will receive $2,500; five runners-up will get $1,000 each. And 20 honorable mentions will receive a burrito party for 20 guests at a Chipotle’s of their choice.

Better get cracking now on that one-of-a-kind costume to win.

Pumpkin Carving:

Yankee Pier in Larkspur invites kids to come in, Oct. 28-31, for its annual pumpkin-carving contest.

There will be various prizes for different age ranges, including giveaways of toys and bookstore gift cards. Contest winners will be announce on Oct. 31 via Facebook.

This week, the Lark Creek Restaurant Group also will be concluding its annual “Pumpkin Festival” of dishes that showcase fall squashes.

Look for such dishes as butternut squash risotto with crispy sage and Parmigiano at Yankee Pier Santana Row in San Jose; Alaskan halibut with pumpkin brown butter puree and pickled hon shimeji mushrooms at One Market in San Francisco; and lobster and pumpkin bisque at the just-opened Fish Story in Napa.

Pumpkin Tasting Menu:

Enjoy that in six delightful courses at Navio at the Ritz-Carlton Half Moon Bay, Oct. 29-31.

The dishes will feature locally-grown pumpkin varieties from Farmer John’s Pumpkin Patch in Half Moon Bay.

Price is $95 per person; and $47.50 for children, ages 5 to 12.

If you’re more a morning person, Navio also offers a Sunday brunch all about pumpkin on Oct. 31.

Seatings are at 11 a.m. and 1:30 p.m. Price is $88 per person; $44 for children, ages 5 to 12.