Premium” Sauce Andalouse (often found in 200 ml or similar small formats) is a popular Belgian condiment, frequently produced by brands like Devos & Lemmens (D&L) or nkkn.in characterized by a creamy, slightly spicy, and tangy flavor profile. It is essentially a refined mayonnaise mixed with tomato paste, peppers (like pimientos or roasted bell peppers), onions, and mustard. 
Key details about this sauce:
Flavor Profile: It is creamy and mildly spicy, often described as a mix between mayonnaise and a tangy, herbed tomato sauce.
Key Ingredients: Rapeseed or sunflower oil, mayonnaise base, tomato purée, egg yolks, vinegar, mustard, spices (often paprika, pili-pili), onion, and often garlic or capers.
Usage: It is considered a staple for Belgian fries, but is also commonly used on burgers, steak, hot dogs, barbecued meats, and as a dip for snacks.
Origin: Although named “Andalouse,” it is a staple of Belgian cuisine.
Nutritional Note: It is a high-fat condiment (typically over 50% fat) and categorized as an ultra-processed food. 
Several brands offer 200g-300ml bottles, such as Devos & Lemmens, which is highly regarded for its premium taste.