Step 1

Preheat the oven to 350F. Spray a 9 x 13 x 3-inch Pyrex Deep baking dish with oil.

Step 2

Heat a large skillet over medium heat. Add the oil and shallots and cook until soft, 6 to 8 minutes.

Step 3

Add the spinach and cook until wilted. Remove from heat.

Step 4

In a large bowl whisk the eggs, milk, heavy cream, Feta, scallions, tomatoes, salt and black pepper.

Step 5

Mix in the spinach and shallots and pour into the prepared dish.

Step 6

Bake until the center is solid and cooked through, about 1 hour 20 minutes.