Fitness fans are constantly trying to do an end run around that calorie-laden Thanksgiving dinner, whether it's a 1,000 calorie workout turkey day morning or careful starvation three days following the food feast. I know I purchase way too much sour cream, butter and shredded cheese for our treasured family casserole recipes.

How about facing Thanksgiving's cardiac casserole defensive line with an offensive move right up the middle? This Thanksgiving, I dare you to replace one of your fat-filled casseroles with a healthy vegetable. Just one. Here are three ideas from the gourmet Martha Stewart:

• Skip the sweet potato casserole with marshmallows on top for Apple, Leek and Butternut Squash Gratin.
  
• Bypass the green bean casserole with fried onions for Green Beans with Golden Raisins (pictured from wholeliving.com).
  
• Swap the creamy mashed potatoes and serve a bowl of colorful roasted vegetables instead.

Since I've laid down this dare, I'm now making roasted butternut squash instead of sweet potato casserole with mini-marshallows, and I'll definitely be working out hard Thanksgiving morning.