Start by slicing up your onions, bell pepper, and zucchini. Set aside.
Next, heat the olive oil in a large skillet on medium heat on the stove and sauté the onions for 5-6 minutes, or until they begin to soften and brown slightly.
Add the bell pepper, zucchini, and italian sausage to the pan, along with the oregano, paprika and black pepper. Continue to cook for another 5-7 minutes, until the sausage browns. I recommend using a wooden spoon to gently break apart the sausage.
While the veggies are cooking, preheat the oven to 350 F.
Next, grease a quiche dish with olive oil.
Transfer your cooked vegetable and sausage mixture into the greased dish.
Next, in a separate small bowl, whisk together the eggs and milk.
Pour the egg mixture into the quiche dish.
Bake for 45-50 minutes, until the edges begin to brown.
Once cooled, slice and enjoy!