Preheat your Yoder Smokers YS640 pellet grill to 375°F set for indirect grilling.
Preheat a Lodge Logic 12” cast iron skillet (either in the cooker or over medium heat on a stovetop/side burner). Add about 1 tablespoon oil. Let the oil heat up then add the bacon, mushrooms, onions and one tablespoon Cattleman’s Grill Tri-tip Seasoning. Cook until the bacon is fully cooked and the mushrooms and onions are tender. Remove the filling from the skillet and rinse the skillet clean.
On a floured surface, roll out the puff pastry until it’s large enough to cover the bottom of the skillet, plus a 1” lip on the sides. Spread the bacon and veggie filling, as well as the grated cheese over the puff pastry.
In a mixing bowl, whisk together the eggs and cream. Pour the mixture over the filling in the skillet. Season the top with 1-2 teaspoons Cattleman’s Grill Tri-tip Seasoning.
Bake until the quiche is set (eggs no longer runny), about 40 minutes.