Place the frozen shrimp in a bowl of cold water and let it sit until thawed.
Drain and place the shrimp in a non-reactive bowl or container.
Pour in 1 cup of fresh squeezed lime juice.
Cover and refrigerate overnight.
The next day, drain the shrimp and discard the lemon juice. Cut the shrimp into smaller pieces.
Place the shrimp in a large mixing bowl and add the juice from 2 limes. Then set aside.
Dice the tomatoes.
Dice the red onion.
Rough chop the cilantro.
Mince the garlic.
Slice the jalapeno in half to remove the seeds and dice. Removing the seeds is optional .
Mix all the vegetables together.
Season the ceviche with 2 tablespoons of olive oil.
And 1/2 teaspoon of sugar.
Also add in 1/2 teaspoon of salt.
And 1/2 teaspoon of black pepper.
Mix well to incorporate and set aside
Make the dressing. Pour the clamato juice into a small bowl.
Then add in the ketchup.
And lastly add in the Valentina hot sauce.
Stir to combine
Pour the dressing over the ceviche .
Mix well.
Cover the ceviche and refrigerate for 1 hour.
Right before serving gently fold in the diced avocados.
Sprinkle on some black pepper and do not mix.
Serve on top of a tostada.
Drizzle some more of the Valentina hot sauce on top of the ceviche.