1. Preheat oven to 350 degrees. Spray an 8×8 pan with non stick spray. Set aside.

2. Either set frozen veggies out for a bit to thaw before mixing or place them in the microwave for a few minutes before mixing. Then add the frozen veggies, onions, mayo and parmesan cheese to a large bowl. Mix all together until combined.

3. Pour the veggie mixture into the casserole dish and spread out evenly.

4. In a medium bowl. melt the stick of butter. Crush the crackers up with your hands and add them to the butter. Mix together to coat the crackers in the butter. Pour the cracker and butter mixture over the veggie mixture and spread out evenly.

5. Bake for about 25-30 minutes or until the edges start to get bubbly and the top gets golden brown. Remove from the oven, let set for 5-10 minutes then serve.

*if the topping starts to get too brown, cover with foil and continue baking