Step 1

Preheat the oven to 375 degrees F (190 degrees C).

Step 2

Unroll each crust into two 9-inch pie pans.

Step 3

Heat oil in a large skillet over medium heat. Cook celery, onion, and garlic in the hot oil for 1 to 2 minutes. Add sausage, breaking apart to brown; sprinkle in sage and continue browning until no longer pink, 5 to 7 minutes. Remove from heat. Add cottage cheese and mix well.

Step 4

Divide meat mixture evenly and spoon into each of the two pie crusts.

Step 5

Whisk eggs, milk, tarragon, salt, and pepper together in a mixing bowl. Pour egg mixture over meat mixture in the pie crusts. Sprinkle Cheddar-Jack cheese over the tops.

Step 6

Bake, uncovered, in the preheated oven on the middle rack until tops are puffed and golden brown, about 40 minutes. Remove from the oven and let stand for 5 to 10 minutes before slicing.