Mystery Squash Chili Over Blue Corn Waffles

We've had this squash since our last co-op pick up and I have no idea what kind it is. I thought it was a type of pumpkin, but it doesn't taste anything like one. Does anyone recognize it?

I was came across this site that inspired me to create a chili with the mystery squash over thier recipe for corn waffles. The chili was really, really simple:

Squash & White Bean Chili Ingredients:

• one can white beans (or 2 cups cooked)
• 1/2 large onion, chopped
  
• 1 green pepper (although I actually forgot this in mine)
• 2 cloves garlic, minced
  
• 1 1/2 cups cubed squash (pumpkin, butternut, etc)
• 2 teaspoons chili powder

Directions: Saute onions and garlic until onions are clear. Add undrained can of beans (or cooked beans and a cup of water), squash and chili powder and let simmer while you make the waffles (or for for about 15 mins). Serve over corn waffles or on it's own..

Do you know what squash this is?