Step 1: Stir together the water, celery, onion, carrots, soup, seasonings, and non-dairy milk in a 3-quart casserole dish.
Step 2: Submerge the noodles into this mixture and press down on them with the back of a large wooden spoon to make sure they are as submerged as possible.
Step 3: Cover the dish tightly with foil or an oven-safe lid and bake the veggie casserole at 400F for 40 minutes.
Step 4: While the casserole bakes, stir together the melted vegan butter and Ritz cracker crumbs. This will be our topping!
Step 5: After 40 minutes, remove the pasta bake from the oven, stir, and top with Ritz cracker mix. Bake another 5-10 minutes until topping is lightly browned.
Let the noodle casserole sit 10 minutes uncovered before serving and enjoying with family and friends!