Chili garlic sauce is a popular condiment in many Asian inspired dishes, especially in Vietnamese and Chinese cuisine. It's a thick, chunky sauce with a spicy, tangy flavor. The sauce contains red chili peppers, garlic, vinegar, and salt. You can find it in most grocery stores down the Asian food aisle. One popular brand that makes this sauce is Huy Fong Foods which is the same company that makes Sriracha sauce.