A question about a recipe: Spicy Garlic Noodles with Crumbled Tofu and Cucumber Salad

I have a question about the recipe "Spicy Garlic Noodles with Crumbled Tofu and Cucumber Salad " from Nathalie Nicole. What would be a good substitute for the arrowroot in this recipe? Thanks!

• Thickener
• arrowroot

Recipe question for: Spicy Garlic Noodles with Crumbled Tofu and Cucumber Salad