Exploring the Culinary Fusion of Mushroom Costras and Beetroot Tostadas

Costra, translating to 'crust' in Spanish, is a traditional dish originating from northern and central Mexico, typically featuring tender cuts of beef topped with a melted cheese crust, often made from Chihuahua or manchego cheese mixed with Oaxaca cheese. In a contemporary twist, chef Santiago Lastra substitutes beef with portobello mushrooms, creating a vegetarian version of this classic. Tostadas, on the other hand, are crisp corn tortillas, traditionally baked or deep-fried to enhance their longevity, and are commonly served with light dishes like ceviches and salsas. Lastra innovatively uses poppadoms to replicate the texture of traditional tostadas in his recipe.

The Guardian

Lastra's beetroot tostadas require several components, including mixed color beetroots, burrata cheese, and a selection of fresh herbs such as oregano and mint. The preparation involves roasting the beetroots and creating two distinct sauces: sesame macha and pink mole. The sesame macha is made by toasting garlic and sesame seeds, blending them with chili flakes and oil, while the pink mole combines roasted beetroots, pine nuts, and garlic, resulting in a vibrant sauce.

The Guardian

For the mushroom costras, the portobello mushrooms are roasted and then flattened before being topped with melted emmental cheese, served on flour tortillas. The dish is garnished with raw salsa verde, made from serrano chilies, tomatillos, and coriander, allowing for a fresh and spicy kick.

The Guardian

The cooking process for both dishes emphasizes the importance of texture and flavor. The poppadoms are deep-fried until crisp, while the mushrooms are roasted and then pressed to enhance their flavor. The tortillas are briefly cooked to maintain their softness, allowing them to hold the toppings effectively. Each component is designed to complement the others, creating a harmonious dish that balances richness with freshness.

The Guardian

While Lastra's innovative approach to traditional Mexican cuisine has garnered attention, some purists may argue that substituting key ingredients alters the authenticity of these classic dishes. Critics often emphasize the importance of preserving traditional recipes and techniques, suggesting that such adaptations may dilute cultural heritage.

The Guardian

Santiago Lastra has expressed his intent to modernize traditional Mexican dishes while respecting their roots. He aims to showcase the versatility of ingredients like mushrooms and beetroots, encouraging a broader appreciation for plant-based options in Mexican cuisine.

The Guardian

Lastra's mushroom costras and beetroot tostadas exemplify a creative fusion of traditional Mexican flavors with modern culinary techniques. By reimagining classic dishes, he not only introduces new textures and flavors but also invites a dialogue about the evolution of cuisine and the importance of innovation in preserving cultural food traditions.

The Guardian