Healthier Mushroom Fettuccine Alfredo

Name: Healthier Mushroom Fettuccine Alfredo
Ingredients: * 1 cup cashew (if you don't have a powerful food processor blender; you'll want to soak these overnight); * 2-3 cup pasta water; * 5-6 cup steamed cauliflower (i just use 1 average sized head); * 1/2 cup almond milk; * 2 tablespoon nutritional yeast; * 4 large garlic clove; * juice from 1 lemon; * 1 teaspoon salt; * 1 teaspoon pepper; * 1lb cooked fettuccine noodle; * 2 tablespoon butter; * 1 shallot, minced; * 1lb fresh slice mushroom; * 1 teaspoon chopped fresh rosemary