Heat the oven to 400ºF/ 200ºC and brush a large backing sheet with a little bit of oil to prevent from sticking. Toss the bread with 1 tablespoon of olive oil, spread it on a single layer and bake until it become golden brown – about 10 min, then set aside. Reduce the oven to 350ºF/ 175ºC
In a large skillet heat the remaining tablespoon of olive oil on medium high heat. Add the sausage and onion and cook, braking up the sausage into small pieces until the sausage is cooked through and the onion is translucent – about 10 min, then stir in the sun-dried tomatoes. Remove from the heat and toss it with the spinach/broccoli.
In large bowl, beat together eggs, milk, ¼ teaspoon salt and ¼ teaspoon black pepper, then add the bread and toss to coat, followed by the sausage mixture.
Transfer to the prepared dish, sprinkle with feta and bake until the center is just set – about 45 min.