Step 1

Combine all of the shrimp with 1 cup of lime juice in a large bowl. Cover and let rest in the refrigerator for at least one hour until the shrimp are mostly pink.

Step 2

In a separate bowl, combine the onion, cucumber, tomatoes, jalapeño, and cilantro.

Step 3

Add the shrimp and mix well.

Step 4

Add the Worcestershire sauce, and season with salt and pepper and additional lime and lemon juice.

Step 5

Mix well and serve on the tostadas adding hot sauce to taste and avocados.