Cut out and discard the tough stems; if using kale or collards, cut out thick center ribs.
Rinse all the greens and shake off any excess water, chop them into 1/2-inch pieces. In a large skillet, cook the greens over low heat, adding them by handfuls and stirring them down as they wilt. Add 1/2 cup of water if the greens seem dry, then cover the skillet and braise for 10 to 15 minutes, or until tender. Pour off any liquid left in the skillet, then season the greens with salt and pepper. Transfer to a bowl and set aside.
Heat the broth and half-and-half in a saucepan, just until bubbles form around the edge of the pan.
In the large skillet, melt the
butter over low heat. Add the flour and cook, stirring, for one minute. Add
the hot broth mixture all at once and stir over medium heat until the sauce
is smooth and thickened. Whisk in the grated Parmesan and ricotta. Stir the
greens into the cheese sauce and pour the mixture into the prepared baking
dish. Sprinkle with the bread crumbs and then sprinkle the grated mozzarella
over the top; bake for 20 minutes, or until the sauce is bubbling and the
mozzarella is melted and lightly browned. Serve immediately.
Serves 6.