vegan Mac Un-Cheese

trying this recipe from:
http://www.yummly.com/recipe/_vegan-Mac-Un_cheese_-Recipezaar?servings=4

1 lb pasta 2 cups vanilla-flavored soymilk or rice milk 2 tablespoons soy margarine 2 tablespoons vegan mayonnaise (such as vegenaise or nayonaise) (optional) 1 cup nutritional yeast 1 teaspoon turmeric

1/4 teaspoon ground sage 1 teaspoon salt 3/4 teaspoon ground pepper 1/2 teaspoon garlic powder

Cook pasta and drain. In a large bowl, combine pasta and all other ingredients. Mix thoroughly and enjoy. For variety, mix in one cup of steamed vegetables, such as broccoli or peas. Vegan Mayo is optional, but recommended for creamier meal. Notes: clumpy, warmed it up in microwave. still seems very runny, added 1tsp egg replacer (would've used cornstarch if I could find some)