Cook the rice: Cook 1 cup of long grain white rice according to package instructions.
Prepare the ingredients: Preheat the oven to 450°F. Wash and dry the poblano peppers. Peel and mince the garlic. Dice the onion. Quarter the lime, and chop the cilantro.
Roast the poblano peppers: Place the 8 poblano peppers on a baking sheet. Drizzle with olive oil and season with salt and pepper. Roast for 8-10 minutes, or until the skin is browned and blistered. Remove from the oven and set aside to cool. Once cool enough to handle, cut a lengthwise slit in each pepper and remove the ribs and seeds while keeping the skin intact. Return the peppers to the baking sheet.
Make the filling: In a large pan, heat 2 tablespoons of olive oil over medium heat. Add the diced onion and garlic, and cook for 2-3 minutes until softened. Stir in the 3 tablespoons of tomato paste, 1 teaspoon of cumin, 1 teaspoon of chili powder, and 1 teaspoon of smoked paprika. Cook for 2-3 more minutes until fragrant. Increase the heat to medium-high and add 1 lb of ground beef and ½ lb of chorizo. Cook, breaking the meat apart with a spoon, for 4-5 minutes, or until fully browned and cooked through. Stir in the 4 tablespoons of roasted pepitas, cooked rice, and 1/2 cup of water. Stir to combine, and season with salt and pepper to taste.
Stuff & bake the peppers: Carefully stuff each poblano pepper with the filling, dividing it evenly among the 8 peppers. Bake the stuffed peppers at 450°F for 6-8 minutes, or until heated through.
Make the crema: In a small bowl, combine ½ cup Mexican crema or sour cream with the juice of half a lime and a handful of chopped cilantro. Add a pinch of salt and pepper, and thin the mixture with 1-2 tablespoons of water if needed.
Serve: Plate the stuffed peppers and drizzle with the crema. Garnish with the remaining cilantro and lime wedges. Enjoy!