Preheat the oven to 350 degrees, grease a 9 inch pan.
In medium heat, sauté the chopped red onion, in olive oil; then add the broccoli cut in florets add the sliced zucchini ( cut long way, then sliced thin) , season with salt and pepper. stir continue cooking till the broccoli is tender.
In Separated bowl, beat the eggs add the parmesan cheese and milk, Season with salt and pepper. Add the sauté vegetables to the mixture, stir well.
Scoop the mixture in the greased pan and bake in preheated pan for 30 minutes. ( till the eggs is set as well check the inside with pick ). Let it cool before serving.