Preheat oven 400
Spray 9 in square baking dish with cooking spray.
Heat butter in skillet over med heat until melted- pour over breadcrumbs in bowl. Stir in parsley.
Increase heat to med-high and add onion- cook 7 to 9 min
Stir in squash cook 4 min.
Add tomatoes and garlic and cook 2 more min.
Transfer mixture to baking dish.
Sprinkle cheese on top, spread breadcrumb mixture over cheese.
Bake 30 to 35 min
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