Cook rice according to package directions, omitting salt and fat.
While rice cooks, combine 1/4 teaspoon salt and next 4 ingredients (1/4 teaspoon salt through black pepper) in a large zip-top plastic bag; add shrimp. Seal and shake to coat.
Heat 1 tablespoon oil in a large skillet over medium-high heat. Add shrimp; cook 3 minutes, turning once. Add garlic; sauté 1 minute. Add tequila and 1 tablespoon cilantro; cook 1 minute.
Combine 1/4 teaspoon salt, 1 tablespoon oil, 1 tablespoon cilantro, and lime juice; pour over rice, tossing to coat. Serve shrimp over rice mixture. Serve with lime wedges, if desired.
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