CSA Summer Yellow Squash Casserole

I recently read that if you plant summer squash in your backyard
garden, you should plant very little because summer squash can be
especially fruitful.  That certainly seems to be true based on the TON
of summer squash we have been getting in our weekly CSA deliveries. 
I've done a fair share of sauteeing and grilling the squash, and
finally reached a point when I just had to try something new.  I
decided to make a summer squash casserole, similar to a mixed
winter/summer squash casserole I made several years ago, by using some
ingredients I had sitting around the house.  Directions follow the
picture of the prepared casserole.

This recipe makes approximately 6 side servings.

Ingredients

• 4 cups chopped yellow squash (approx. 2 medium squash)
• 5 cloves garlic, chopped
• 3/4 cup chopped onion
• 2 tbsp. butter
• 1/2 cup panko breadcrumbs
• 3/4 cup shredded parmesan
• salt, black pepper and crushed red pepper to taste

Directions

• Preheat oven to 375 degrees.
• Melt the butter on medium-high heat in a wide saucepan
• Add the garlic and onion, and saute until the onion softens (approx. 2 – 3 minutes)
• Add the chopped yellow squash, sauteeing on high heat for
  approximately 10 minutes, or until the squash pieces soften and appear
  semi-cooked (inner parts of the squash have been softened, and appear
  somewhat translucent, but the squash has not browned).  Add salt,
  crushed red pepper and black pepper to taste.
• Transfer contents to a lightly oiled or buttered 8 x 8 inch baking
  dish.  Sprinkle the panko breadcrumbs on top of the mixture, and then
  add the parmesan to cover the entire dish.
• Bake uncovered for approximately 20 minutes, or until there is a lightly browned crust.  Serve immediately.

While I enjoyed eating this casserole, I think that mixing in 1/2 a
cup of a softer, shredded cheese — perhaps some mozzarella — to the
squash mixture would be a welcome addition to the dish, both to add
flavor and make the texture a bit creamier.  I think that this recipe
would also work well doubled in case you also have to deal with an
abundance of yellow squash!