Pizza with bean puree and roasted squash

We have made this twice and the first time it was unspeakably amazing.  The second time, it was just ok.  I am telling you about it because of the bean puree.  It is amazing!  And I think all our pizzas would be amazing with it... if we make it right.  And we are going to make it right!  It's great as a dip or a spread on wraps (like hummus but better).

Pizza with bean puree and roasted squash
serves just the right amount.  I dont know.  Maybe 4 with a salad

The Puree:
1 can cannellini, rinsed and drained (or make your own, of course!)
¼ cup olive oil, the best you have
1 tablespoon lemon juice, fresh if you can
2 cloves garlic
½ teaspoon dried thyme
1 teaspoon sea salt
½ teaspoon freshly ground black pepper
1 to 2 tablespoons water

Puree it all together in the food processor or blender.  It's best done in advance.  Add the water to get a nice spreadable consistency, like hummus.  Dont skimp on the thyme and garlic.  Taste for the flavor.

For the pizza:
1-2 onions, thinly sliced
2 cups butternut squash, peeled and cut into 1/2-inch cubes
1 cup spinach or arugula
Pizza dough

Caramelize the onion while you roast the squash.  Assemble the pizza, starting with the bean puree, then the greens, then the onions and squash.  Salt and pepper as you like.