Step 1

Preheat the oven to 350 degrees F.

Step 2

Grease a 9x9 inch casserole dish.

Step 3

Heat the oil in a large skillet over medium heat.

Step 4

Add the squash and onion. Saute until tender and the onion is translucent.

Step 5

Remove from heat and stir in the Parmesan and cheddar cheese, sour cream, salt, and pepper.

Step 6

Pour mixture into your 9x9 baking dish.

Step 7

Mix 2 tablespoon butter, crushed crackers, and parmesan. Sprinkle evenly over the squash.

Step 8

Bake 20 minutes.

Step 9

Remove and serve warm.