One of our favorite new recipes - Karen's kids like it too. 
It's from http://animalvegetablemiracle.com


SWEET POTATO OR SQUASH QUESADILLAS

Makes 4 quesadillas

1 large sweet potato or half a small winter squash, cooked and mashed (any extra mashed squash freezes beautifully)
1 onion
1 clove garlic (optional)
1 tsp oregano 
1 tsp basil
1/2 tsp cumin
chile powder to taste (optional)
olive oil for saute
4 large flour tortillas
4 oz. cheese, sliced or grated
4 leaves washed Swiss Chard (or other quick-cooking greens), loosely chopped

Preheat oven to 400 (or use toaster oven or griddle)

- Chop and saute garlic and onion in a large skillet 
- Add spices to onions
- Spread squash mix on half of each tortilla 
- Top with cheese and greens
- Fold tortillas to close 
- Lightly oil outside of tortilla (optional)
- Flip quesadilla and lightly oil other side (optional)
- Bake on cookie sheet or griddle until browned and crisp (about 15 min. in oven, quicker on griddle)
- Cut into wedges for serving

Shortcut:

- Omit onion and spices