Bring a large pot of salted water to a boil and cook the pasta until just al dente, following package instructions. Drain and set aside.
Heat a skillet over medium heat and add the diced or sliced pancetta. Cook, stirring occasionally, until the edges are crispy and golden brown, about 4–5 minutes. Remove from pan and set aside.
Add olive oil to the same skillet if needed, then toss in the minced garlic. Sauté until fragrant, about 30 seconds, until it starts to bubble and smells aromatic.
Add the peas to the skillet and cook just until they soften slightly, about 2 minutes. If using frozen peas, ensure they are heated through.
Return the crispy pancetta to the skillet, stirring to combine, allowing flavors to meld for another minute. Season with salt and pepper to taste.
Add the cooked pasta to the skillet and toss well to coat in the pancetta and pea mixture. If the mixture feels dry, add a splash of reserved pasta water.
Stir in the grated Parmesan cheese until melted and evenly distributed, creating a slightly creamy texture. Adjust seasoning as needed.
Serve immediately, with extra Parmesan and freshly ground black pepper on top for added flavor. Enjoy the warm, savory pasta with crispy pancetta and tender peas.