Bring a large pot of salted water to a boil and cook the pasta until al dente. Before draining, reserve about half a cup of pasta water. This starchy water helps loosen the sauce and makes it cling to the pasta beautifully.
Add sun-dried tomatoes, ricotta, pine nuts, lemon juice, miso paste, chili flakes, smoked paprika, and black pepper to a food processor. Blend until smooth, slowly streaming in the reserved tomato oil to create a creamy, vibrant pesto.
Heat olive oil in a skillet over medium heat and cook pancetta until golden and crispy. Add garlic and pine nuts, cooking briefly until fragrant. Stir in the pesto and warm gently, then add the cooked pasta and a splash of pasta water.
Toss everything together until the pasta is well coated. Taste and adjust seasoning if needed. Serve immediately with fresh thyme or extra black pepper on top.