Preheat oven to 350º F. In a large frying pan, heat garlic oil and add kale; add water, cover and steam, stirring occasionally for about 10-15 minutes. Add the tomatoes to the pan and continue to cook for a few more minutes (add a little more oil, if desired); season with salt and pepper. While the kale is cooking, split each pie crust in half and roll into 4 rounds of dough. Scoop kale mixture into the center of each dough round and top with desired amount of sausage (or falafel) and cheese. Fold dough up and pinch around; kale mixture will stick out of the top. Top with more cheese, if desired. Brush dough with milk. Place in oven and bake for about 30-40 minutes or until crust is golden brown.