Puree 1 bunch cilantro, 1/4 red onion, 2 garlic cloves, 1/2 cup beer, 1 tablespoon kosher salt and 1 teaspoon cumin in a blender. Fry the mixture in a pot with a few tablespoons of oil, stirring, until fragrant, 5 minutes. Add 2 cups long-grain rice; stir until glossy. Add 2 cups chicken broth and simmer for 20 minutes. Stir in 1 cup thawed frozen peas and carrots; let sit 5 minutes.