Combine the flour, salt and pepper in the bowl of a food processor. Add butter and cheese and process until the mixture resembles sand.
Add water and pulse several times until dough just comes together.
Gather the dough and form into a disk. Wrap dough in plastic wrap and refrigerate 1 - 3 hours.
On a lightly floured surface, roll the dough into a 13 - 14-in. circle. Line a 10-in skillet with the dough and crimp the edges of dough.
Preheat the oven to 400°F/205°C.
Line the dough in the skillet with a piece of aluminum foil and fill with pie weights or dried beans.
Bake 15 minutes or until the dough starts to look dry.
Remove from oven and lower temperature to 350°F/180°C. Carefully remove aluminum foil from the pan.
Place the spinach in a microwave safe bowl and drizzle with a little water. Microwave spinach on high for 30 - 40 seconds or until the spinach is wilted. Drain in colander. Cool slightly. Wrap the spinach in a cotton cloth towel and carefully squeeze out water. Chop spinach. Set aside.
To the same bowl, add scallions, peppers and oil and microwave 1 - 2 minutes or until the vegetables are tender; drain.
In a large bowl, whisk together the eggs and cream; add salt, pepper, thyme and 1 c. cheddar cheese.
Gently stir in spinach, scallions and peppers and pour all into the prepared pastry shell. Top with the remaining cheddar cheese and bake 35 - 40 minutes or until filling is set.
Cool slightly and serve. (Note: This recipe can be prepared with either your favorite homemade pie dough or prepared pie dough from the store.)