Cornbread without serrano molasses

1 cup frozen diced onion, red and green bell peppers, and celery 2 small garlic cloves, pressed 1 tablespoon canola oil 1 1/2 pounds butternut squash, peeled,[...]

1 cup yellow cornmeal 1/2 cup all-purpose flour 1 1/2 teaspoons baking powder 1 teaspoon baking soda 1/2 teaspoon salt 1 1/2 cups buttermilk 1 large egg 1/4[...]