Light Cheesy Squash Casserole

I love squash casserole, but I was looking for a lighter recipe. I found this great lower cal recipe, and it comes from... 3 Fat Chicks on a Diet. Thought that was funny. Only 95 calories per serving, and it's nice and cheesy!

2 lbs yellow summer squash — sliced
3/4 c chopped onions
1 tbsp light butter
2 tbsp all-purpose flour
1 c skim milk
3/4 c shredded fat free cheddar cheese
1/2 tsp salt
1/4 tsp pepper
cooking spray
1/2 c Panko

Spray a large pan and heat over medium-high heat. Saute onions and squash for 5-7 minutes, until soft. In another smaller sauce pan, melt the butter over medium heat. Add flour; cook 1 minute, stirring constantly. Gradually add milk; cook, stirring constantly, until mixture is thickened and bubbly. Remove from heat; add cheese, salt, and pepper, stirring until cheese melts. Add to the squash mixture; stir well.

Spoon squash mixture into a shallow 1 1/2 quart casserole coated with cooking spray. Sprinkle squash mixture evenly with Panko. Bake at 350°F for 20-25 minutes or until thoroughly heated.

Original recipe found here.