Preheat oven to 400°F (204°C).
Sauce: Blend all Cottage Cheese Alfredo Sauce ingredients until smooth, about 1 minute of blending.
Boil Pasta: Cook 16 oz penne pasta in salted water according to package instructions. Cook until al dente (stop and drain 1 or 2 minutes before it's done).
Microwave Broccoli: Add 4 cups broccoli florets to a large microwave-safe bowl. Add a splash of water, cover tightly (either with plastic wrap or with a plate), and microwave for 2 to 3 minutes, until bright green and tender.If you prefer not to microwave, the broccoli can also be steamed or quickly boiled until tender.
Assemble: In a large bowl, gently stir together boiled pasta, cooked broccoli, 2 15-oz cans cannellini beans, half of the mozzarella, and sauce. Transfer to a large casserole dish. Top with remaining mozzarella.
Bake for 15 to 20 minutes, or until top is golden and melty and sauce is bubbling at the edges. Serve warm!
