Heat the vegetable oil in a large pot or Dutch oven over medium-high heat.
Add the goat meat chunks and brown on all sides, about 5-7 minutes. Remove the meat and set aside.
In the same pot, add the chopped onion and cook until softened, about 5 minutes.
Stir in the minced garlic and cook for another minute.
Add the aji amarillo paste and tomato paste, cooking for 2-3 minutes until the mixture is fragrant.
Return the browned goat meat to the pot.
Pour in the beer or beef broth and bring to a boil.
Stir in the chopped fresh cilantro, ground cumin, paprika, salt, and black pepper.
Reduce heat to low, cover, and simmer for about 1-1.5 hours, or until the meat is tender.
Add the diced potatoes and frozen peas to the pot. Continue cooking for another 20-30 minutes, until the potatoes are tender and the sauce has thickened.
Adjust seasoning with salt and pepper if needed.
Enjoy your meal!