Preheat oven to 350 degrees.
Shape pizza dough into a 4-inch circle; cover and let stand for 5 minutes then roll into an 11-inch circle on a lightly floured surface. Fit the dough into a 9-inch pie plate lightly coated with olive oil; flute the edges. In a small bowl, combine spinach and sour cream.
In a medium bowl, whisk together evaporated skim milk, salt, pepper and eggs. Stir 1/3 cup of milk/egg mixture into the spinach mixture then spoon the milk/egg/spinach mixture on the prepared crust.
Add the caramelized onions and top with the bacon and cheese. Pour remaining milk/egg mixture over the cheese. Place the pie plate on a baking sheet and bake for 45 minutes or until set.
Allow quiche to stand for 10 minutes before cutting into wedges.