Shrimp ceviche from Sweet Butter in Sherman Oaks

Name: Shrimp ceviche from Sweet Butter in Sherman Oaks
Ingredients: 1 pound black tiger shrimp, tail-on; 3/4 cup fresh lemon juice; 1 onion; 1/2 bunch fresh cilantro; 2 to 3 tomatoes; 1/2 to 1 habanero pepper, stemmed and seeded; 1/4 teaspoon ground cumin; 1/4 teaspoon freshly ground black pepper; 1/2 teaspoon dried oregano; 1/4 teaspoon garlic powder; Sea salt, to taste